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°
Degree symbol
In UnicodeU+00B0 ° DEGREE SIGN (°)
Different from
Different from
Related
See also
  • U+2103 ℃ DEGREE CELSIUS
  • U+2109 ℉ DEGREE FAHRENHEIT
  • U+212A K KELVIN SIGN

The degree symbol or degree sign, °, is a glyph or symbol that is used, among other things, to represent degrees of arc (e.g. in geographic coordinate systems), hours (in the medical field), degrees of temperature or alcohol proof. The symbol consists of a small superscript circle.

History

[edit]

The word degree is equivalent to Latin gradus which, since the medieval period, could refer to any stage in a graded system of ranks or steps. The number of the rank in question was indicated by ordinal numbers, in abbreviation with the ordinal indicator (a superscript letter ⟨o⟩).

Use of "degree" specifically for the degrees of arc, used in conjunction with Arabic numerals, became common in the 16th century, but this was initially without the use of an ordinal marker or degree symbol: instead, various abbreviation of gradus (e.g., Gra., Gr., gr., G.).[1] The modern notation appears in print in the 1570s, with a borderline example by Jacques Pelletier du Mans in 1569, and was popularized by, among others, Tycho Brahe and Johannes Kepler, but didn't become universal.

Similarly, the introduction of the temperature scales with degrees in the 18th century was at first without such symbols, but with the word "gradus" spelled out. Use of the degree symbol was introduced for temperature in the later 18th century and became widespread in the early 19th century. Antoine Lavoisier in his "Opuscules physiques et chymiques" (1774) used the masculine ordinal indicator with Arabic numerals – for example, when he wrote in the introduction:

... une suite d'Expériences [...] 1º. sur l'existence du même fluide élastique [...] (p. vi)
(... a series of experiments [...] firstly, on the existence of that same elastic fluid [...])

The 1º. is to be read as primo meaning "in the first place", followed by 2º. (secundo, "in the second place"), etc. In the same work, when Lavoisier gives a temperature, he spells out the word "degree" explicitly.[2]

An early use of the degree symbol for temperature is that by Henry Cavendish in 1776 for degrees of the Fahrenheit scale.[3]

The symbol is also declared as a notation for degrees of arc as early as 1831, in an American mathematics textbook for schools.[4]

Typography

[edit]

In the case of degrees of angular arc, the degree symbol follows the number without any intervening space, e.g. 30°. The addition of minute and second of arc follows the degree units, with intervening spaces (optionally, non-breaking space) between the sexagesimal degree subdivisions but no spaces between the numbers and units, for example 30° 12′ 5″.

In the case of degrees of temperature, three scientific and engineering standards bodies (the International Bureau of Weights and Measures, the International Organization for Standardization and the U.S. Government Printing Office) prescribe printing temperatures with a space between the number and the degree symbol, e.g. 10 °C.[5][6] However, in many works with professional typesetting, including scientific works published by the University of Chicago Press or Oxford University Press, the degree symbol is printed with no spaces between the number, the symbol, and the Latin letters "C" or "F" representing Celsius or Fahrenheit, respectively, e.g. 10°C.[7][8] This is also the practice of the University Corporation for Atmospheric Research, which operates the National Center for Atmospheric Research.[9] Both ASTM International and NIST, the official US entities related to the standardization of the use of units, require a space between the numerical value and the unit designator,[10] except when the degree symbol alone is used to denote an angular value.

Use of the degree symbol to refer to temperatures measured in kelvins (symbol: K) was abolished in 1967 by the 13th General Conference on Weights and Measures (CGPM). Therefore, the triple point of water, for instance, is written simply as 273.16 K. The name of the SI unit of temperature is now "kelvin", in lower case, and no longer "degrees Kelvin".

In photography, the symbol is used to denote logarithmic film speed grades. In this usage, it follows the number without spacing as in 21° DIN, 5° ASA or ISO 100/21°.

Encoding

[edit]

The degree symbol is included in Unicode as U+00B0 ° DEGREE SIGN (°).

For use with wide character fonts, there are also code points for U+2103 ℃ DEGREE CELSIUS and U+2109 ℉ DEGREE FAHRENHEIT.

The degree sign was not included in the basic 7-bit ASCII set of 1963. In 1987, the ISO/IEC 8859 standard introduced it at position 0xB0 (176 decimal) in all variants except Part 5 (Cyrillic), 6 (Arabic), 7 (Greek) and 11 (Thai). In 1991, the Unicode standard incorporated all of the ISO/IEC 8859 code points and thus included the degree sign (at U+00B0)..

The Windows Code Page 1252 was an extension of ISO/IEC 8859-1 (8859 Part 1 or "ISO Latin-1") standard, so it had the degree sign at the same code point, 0xB0. The code point in the older DOS Code Page 437 was 0xF8 (248 decimal); therefore, the Alt code used to enter the symbol directly from the keyboard is Alt+248.

Lookalikes

[edit]

Other characters with similar appearance but different meanings include:

Keyboard entry

[edit]
Further information: Unicode input and QWERTY § Multilingual_variants

Some computer keyboard layouts, such as the QWERTY layout as used in Italy, the QWERTZ layout as used in Germany, Austria and Switzerland, and the AZERTY layout as used in France and Belgium, have the degree symbol available directly on a key. But the common keyboard layouts in English-speaking countries do not include the degree sign, which then has to be input some other way. The method of inputting depends on the operating system and keyboard mapping being used.

See also

[edit]

References

[edit]
[edit]
Revisions and contributorsEdit on WikipediaRead on Wikipedia

Degree symbol

View on Grokipedia
from Grokipedia
The degree symbol, denoted as °, is a typographical consisting of a small superscript circle that primarily represents one degree of arc in angular measurements, such as in and astronomy, where a full circle is divided into 360 degrees. It is also widely used to indicate degrees of temperature on the (°C) and (°F) scales, with the symbol placed immediately before the unit letter and a space separating the numerical value, as standardized in the (SI). Additionally, the degree symbol denotes units of and in geographic coordinate systems, measuring positions north or south of the () and east or west of the (), each ranging from 0° to 90° or 180° respectively. Encoded in as U+00B0 DEGREE SIGN since version 1.1 in 1993, it functions as a spacing character distinct from similar glyphs like the ring above or superscript zero. The origins of the degree symbol trace back to ancient astronomical notations, with early uses by Claudius Ptolemy (c. 85–c. 165 CE) in his employing a related form for angular divisions, though not identical to the modern superscript circle. The contemporary ° symbol, resembling a small raised zero, first appeared in modern mathematical notation in the 1569 revised edition of Arithmeticae practicae methodus facilis by Gemma Frisius, featured in an appendix by Jacques Peletier dated 1558. By 1571, Erasmus Reinhold adopted the notation ° for degrees, ' for minutes, and " for seconds in his Prutenicae tabulae coelestium motuum, standardizing its application in celestial calculations. Over time, the symbol extended beyond angles to temperature scales, influenced by 18th- and 19th-century developments in thermometry, and to for precise global positioning. In digital typography and computing, the degree symbol's inclusion in standards like ISO/IEC 8859 (introduced at position 0xB0 in 1987) ensured compatibility across character sets before Unicode's broader adoption. It is input via keyboard shortcuts such as Alt+0176 on Windows or Option+Shift+8 on macOS, and in HTML as ° or °. While primarily neutral and superscripted, the symbol avoids confusion with combining marks like U+030A (ring above) in composed characters, and specialized variants exist for compatibility, such as U+2103 (℃) for degree Celsius, though the preferred form is the sequence U+00B0 followed by the letter C.

History and Origins

Etymology

The term "degree" originates from the Latin gradus, meaning "step" or "degree," referring to a unit of progression or rank in a sequence. This root evolved through degradus (combining de- "down from" and gradus), entering as degré around the , and then as "degree" by circa 1200, initially denoting a stage or rank before extending to measurement contexts. The degree symbol itself, °, emerged as a typographic convention representing a small superscript circle to signify one 360th part of a full circle, symbolizing an angular "step" in geometric or celestial divisions. This design links directly to ancient Babylonian practices, where the circle was divided into 360 units based on their (base-60) system and an approximate 360-day solar year; the Greeks, including and , adopted and refined this for astronomy and , preserving the conceptual "step" as a fundamental angular measure. Early textual references to gradus in the sense of a measured degree appear in medieval Latin works on astronomy and music theory, predating the widespread use of the ° symbol. In astronomy, 12th-century Latin translations of Ptolemy's Almagest, such as Gerard of Cremona's version, use gradus for angular positions of celestial bodies.

Historical Development

In ancient astronomy, the concept of the degree as a unit of angular measurement was expressed through verbal terms and specific symbols distinct from the modern notation. In Ptolemy's Almagest (2nd century CE), angular divisions were denoted using Greek words such as moira (part or degree), along with alphanumeric symbols for degrees, minutes, and seconds, with Latin translations employing "gradus" to signify the same unit. The modern degree symbol ° emerged in the amid advancements in astronomical computation and printing. An early instance appears in the 1558 appendix by Jacques Peletier to Gemma Frisius's Arithmeticae practicae methodus facilis, where a small superscript circle denoted degrees in multiplication tables related to angular measurements. By 1571, Erasmus Reinhold adopted the notation ° for degrees, ' for minutes, and " for seconds in his Prutenicae tabulae coelestium motuum, standardizing its application in celestial calculations. By the , the expanded beyond astronomy to scales. Widespread adoption in followed in the , as improved typefounding techniques standardized the in scientific texts and journals by the , enabling consistent reproduction across European publications. In the , the degree symbol achieved formal international standardization for . It was incorporated into ISO encoding standards, notably ISO/IEC 8859-1 in 1987, which assigned it the 0xB0 to ensure uniform digital representation in computing and documentation. Later, ISO 80000-5 (2007, building on earlier ISO 31 series from the 1970s) defined its use in quantities and units, solidifying ° as the canonical for angular and degrees in global scientific communication.

Usage

In Angles and Geometry

The degree symbol (°) denotes a unit of angular measurement equal to 1/360th of a full circle or complete rotation, serving as the primary means to quantify plane angles in geometry. For instance, a right angle, formed by two perpendicular lines, measures 90°. This unit extends to the measurement of arcs along a circle's circumference and to spherical angles, particularly in navigation, where positions are specified using degrees of latitude and longitude. In the historical development of , Euclid's Elements employed the as the basic unit for angle measurement. This foundational approach influenced subsequent geometric frameworks, though explicit degree notation emerged later in mathematical history. Contemporary applications in and frequently utilize degrees for computational purposes; for example, the sine of 30° equals 1/2, illustrating the unit's role in standard trigonometric evaluations. International standards, including ISO 80000-2 as referenced in SI guidelines, prescribe no space between the numerical value and the degree symbol for angular measures, such as 45°. For interoperability with the SI coherent unit, conversion to radians follows the relation 1∘=π/1801^\circ = \pi/180 rad.

In Temperature Measurement

The degree symbol (°) plays a central role in denoting temperature measurements on scales such as Celsius and Fahrenheit, where it indicates the size of a degree interval relative to fixed points like the freezing and boiling temperatures of water. In these contexts, the symbol follows the numerical value to express specific temperatures, distinguishing thermal scales from absolute ones like Kelvin. Early proposals for temperature scales incorporating degrees emerged in the late 17th and early 18th centuries, building on advancements in thermometry. In 1701, Danish astronomer Ole Christensen Rømer introduced a scale with zero at the freezing point of (a mixture of ice, water, and ) and 60° at the of water under standard pressure, aiming for astronomical compatibility by dividing the range into 60 parts. This was later refined by in the early 18th century. In 1742, Swedish astronomer proposed a centigrade scale initially inverted, with 100° at water's freezing point and 0° at its , which was reversed posthumously by in 1744 to align 0° with freezing and 100° with boiling for greater practicality. These foundational scales established the degree as a standardized unit for temperature differences, influencing modern conventions. According to the International System of Units (SI) and guidelines from the National Institute of Standards and Technology (NIST), a non-breaking space must separate the numerical value from the degree symbol and unit letter in formal notation, such as 23 °C or 73 °F, to treat the combination as a single unit symbol. This spacing ensures clarity and consistency in scientific and technical writing, preventing misinterpretation of the symbol as a superscript or footnote marker. For the Kelvin scale, which measures thermodynamic temperature absolutely, no degree symbol is used; instead, values are written with a space before the K, as in 273 K, reflecting its status as a base unit rather than a derived degree interval. A distinct variation exists for the Fahrenheit scale, where the dedicated Unicode character ℉ (U+2109, DEGREE FAHRENHEIT) can denote the scale name itself, though the preferred form in most technical contexts remains °F with the standard degree symbol. In informal writing, common errors include omitting the required space, resulting in fused notations like 10°C, which violates SI rules and reduces , particularly in digital typesetting where may exacerbate visual confusion. Another frequent mistake is substituting a superscript "o" (oC) for the proper degree symbol (°C), which alters the intended meaning and is discouraged in precise documentation.

Other Contexts

In geographic coordinates, the degree symbol denotes angular measurements for on Earth's surface, typically expressed in degrees (°), minutes ('), and seconds (") to specify precise locations. For example, the coordinates for are approximately 40° 42′ 51″ N, 74° 0′ 21″ W, where the symbol follows the numerical degree value without a space. This notation divides the globe into a grid, with ranging from 0° at the to 90° at the poles and from 0° to 180° east or west of the . Beyond standard measurements, the degree symbol appears in several specialized fields. In alcohol , particularly for spirits, it customarily follows the proof value to indicate alcohol strength, such as 100° proof denoting 50% in the U.S. system, where proof is twice the ABV. In , the symbol is integral to the DIN (Deutsche Industrie Norm) film speed scale, an older logarithmic system that preceded modern ISO ratings; for instance, ISO 100 corresponds to 21°, where each 3° increment doubles the film's light sensitivity. In music theory, the degree symbol denotes diminished chords or intervals, as in C° for a C (C-E♭-G♭), distinguishing it from major or minor qualities in . In modern digital applications, the degree symbol enhances user interfaces and interactive experiences. Weather apps frequently incorporate it in displays, such as "25°C" in or Android designs, ensuring compact and intuitive readability for global users. In video gaming, it specifies rotation angles for 3D models and cameras, like a 90° yaw turn in first-person shooters, aiding developers in precise orientation controls via tools like Unity or [Unreal Engine](/page/Unreal Engine). While the degree symbol itself (U+00B0) is a standard character, related emojis like the fire symbol (🔥, U+1F525) evoke intensity in digital contexts, such as gaming effects or app notifications for high temperatures.

Representation

Typography and Styling

The typography of the degree symbol (°) emphasizes its role as a compact, elevated that integrates seamlessly with numerals in technical and scientific text. In print and digital , the symbol is conventionally positioned as a superscript, raised approximately to the height of the numeral's midline or slightly higher, to denote its modifier status without disrupting line flow. This raised placement distinguishes it from baseline and aligns with standards for mathematical and notation. Spacing conventions for the degree symbol vary by context to ensure clarity and adherence to international guidelines. For angular measurements, such as in , no space is inserted between the numeral and the symbol (e.g., 30°), as specified in ISO 80000-1 for plane angle units including degrees, minutes, and seconds. In contrast, for scales, a precedes the degree symbol, followed by another space before the unit abbreviation (e.g., 10 °C), per ISO 80000-5 and the SI Brochure from the International Bureau of Weights and Measures (BIPM). aligns with this for formal scientific writing, recommending a space before the symbol in expressions (e.g., 8 °C) to separate the numerical value from the unit. Stylistic variations of the degree symbol reflect its historical evolution and typographic challenges across fonts. Originally derived from a small superscript "o" (as in early mathematical texts where a raised zero glyph served the purpose), the dedicated ° symbol emerged in the 17th century as a distinct small circle, though the superscript "o" persisted as an alternative in some handwriting and early printing until standardized encoding. In modern typography, font rendering can introduce subtle differences: serif fonts often depict the symbol as a precise, thin ring elevated above the baseline, while sans-serif fonts may render it as a fuller circle that risks visual confusion with a zero (0) if scaling or kerning is suboptimal, particularly in low-resolution displays or variable fonts. Certain standards prohibit the degree symbol in specific contexts to maintain consistency in the International System of Units (SI). The 13th General Conference on Weights and Measures (CGPM) in 1967 adopted Resolution 3, renaming the unit of thermodynamic temperature from "degree Kelvin" (symbol °K) to simply "kelvin" (symbol K), thereby avoiding the degree symbol altogether for absolute temperatures to differentiate it from interval-based scales like Celsius.

Character Encoding

In digital systems, the degree symbol (°) is primarily represented in Unicode as U+00B0 DEGREE SIGN, a spacing character in the Latin-1 Supplement block (U+0080–U+00FF). This code point has been part of the Unicode Standard since version 1.1 and is used for general purposes such as angles and geometric measurements. For temperature notations, Unicode provides compatibility characters U+2103 ℃ DEGREE CELSIUS and U+2109 ℉ DEGREE FAHRENHEIT in the Letterlike Symbols block (U+2100–U+214F); these decompose to the degree sign combined with the respective capital letters C and F, but U+00B0 is recommended for broader compatibility. Prior to widespread Unicode adoption, the degree symbol appeared in various legacy 8-bit character encodings. The ISO/IEC 8859-1 standard, published in 1987 and known as Latin-1, assigns it to code position 0xB0 (decimal 176) in its Western European repertoire. Microsoft's code page, an extension of ISO 8859-1 introduced in the early 1990s, retains this mapping at 0xB0, ensuring compatibility with Latin-1 text in Windows environments. In the original IBM PC's (CP437), used in systems from 1981 onward, the degree symbol is at 0xF8 (decimal 248), reflecting early hardware-specific glyph designs. For web compatibility, the degree symbol is supported via the HTML named entity °, which resolves to U+00B0 and has been standard since HTML 2.0. Numeric entities like ° or ° also work universally. However, in early web development before UTF-8 dominance, encoding mismatches often caused mojibake; for instance, the UTF-8 sequence C2 B0 for U+00B0, when misinterpreted as Windows-1252 or ISO 8859-1, renders as ° due to C2 mapping to  and B0 to °. The following table summarizes key encodings for the degree symbol:
EncodingCode PointDecimalDescription/Source
UnicodeU+00B0176DEGREE SIGN; Unicode Standard v17.0
ISO/IEC 8859-10xB0176Latin-1 (1987); Western European set
Windows-12520xB0176Microsoft extension of Latin-1
IBM CP4370xF8248MS-DOS original; PC-8
HTML Entity°-Named entity for web

Similar Symbols

Lookalikes

The degree symbol ° (U+00B0) bears visual resemblance to several other Unicode characters, which can lead to confusion in digital typography, particularly in fonts where rendering variations emphasize their circular forms. The superscript ⁰ (U+2070) is a frequent , often employed as a substitute in or legacy systems lacking dedicated support for the degree sign, as both appear as a small, elevated circular . Similarly, the modifier letter small o ᵒ (U+1D52), used in phonetic notations, mimics the degree symbol's compact, superscript-like o-shape. The ring above ˚ (U+02DA), a for letters in languages like Swedish, is another close visual match in many fonts, where it renders as a standalone small circle comparable to °. Additional similarities arise with the masculine º (U+00BA), which shares a rounded, superscript-adjacent form and is sometimes misused for degrees in informal , especially when the degree symbol is unavailable. The degree symbol (°) is distinct from the prime (′) and double prime (″) symbols used to denote arcminutes and arcseconds in angular measurements. While the degree symbol represents a full angular unit equal to 1/360 of a , the prime indicates 1/60 of a degree (an arcminute), and the double prime denotes 1/60 of an arcminute (an arcsecond), as in the notation 30° 15′ 20″ for 30 degrees, 15 arcminutes, and 20 arcseconds. These symbols are not interchangeable, as substituting the degree symbol for primes would alter the measurement's precision and meaning in fields like astronomy and . The degree symbol also differs semantically from the masculine (º, U+00BA) and feminine (ª, U+00AA) ordinal indicators used in languages such as Spanish and to denote ordinal numbers, as in "1º lugar" for "first place." Unlike the degree symbol, which functions as a for angles or , these ordinal indicators serve a grammatical role in indicating sequence or rank and are superscripted variants of the letters "o" and "a," respectively. This distinction prevents confusion in multilingual texts, where the degree symbol maintains its quantitative purpose. Finally, the degree symbol is unrelated to the ring diacritic (˚, U+02DA, or combining ring above, U+030A), which appears as a superscript circle over a base letter in characters like Å (U+00C5, Latin capital letter A with ring above) to represent distinct phonemes in Scandinavian languages. The degree symbol is a standalone spacing character used exclusively for measurements, whereas the ring diacritic modifies letters and is avoided in scientific notation to prevent misinterpretation as a degree indicator.

Input Methods

Keyboard Entry

On Windows systems using a standard US keyboard layout, the degree symbol (°) can be entered by holding the and typing 0176 on the , then releasing the ; this method relies on the system for inserting ASCII and characters. On macOS with a standard keyboard layout, the degree symbol is produced by pressing Option + Shift + 8 simultaneously. In environments supporting X11 input methods, such as those using the en_US. locale, the degree symbol is entered using the followed by o and then o again; the Compose key must first be configured, often mapped to a modifier like the right . International keyboard layouts provide direct access to the degree symbol without universal shortcuts. On the French AZERTY layout, commonly used in France and Belgium, the symbol is accessed by pressing the key immediately to the right of the 0 key (°) without a modifier. On the Italian QWERTY layout, it is accessed using AltGr + 0. These placements reflect regional typographic standards for frequently used symbols in measurement and notation. On mobile devices, keyboards allow entry of the degree symbol by switching to the (via the 123 key) and long-pressing the 0 key, which brings up a popup menu including ° for selection. Similarly, on Android devices using the default keyboard, long-pressing the 0 key after accessing the symbols view (via ?123 then =<) displays the degree symbol in the variant popup.

Alternative Production Methods

In Microsoft Word, users can insert the degree symbol through the Insert Symbol dialog box, accessible via the Insert tab in the ribbon, where the symbol is selected from the Symbols group under common fonts like Times New Roman or , then inserted into the document. On Windows systems, the Character Map utility, a built-in accessory available through the Start menu search, allows viewing and copying the degree symbol (Unicode U+00B0) from installed fonts for pasting into applications. Similarly, on macOS, the Emoji & Symbols viewer, invoked via Control-Command-Space or the Edit menu, provides a searchable interface to locate and insert the degree symbol into text fields across apps like TextEdit or Pages. In web development, the degree symbol is produced using the HTML entity &deg;, which renders as ° in compliant browsers, or the Unicode escape \u00B0 in CSS and JavaScript contexts for dynamic insertion. For document preparation in LaTeX, the degree symbol is generated with the command ^{\circ} in math mode for angles, or via the siunitx package's \ang{} macro (e.g., \ang{90}) for standardized typesetting of measurements, requiring the package inclusion \usepackage{siunitx}. As workarounds in plain text environments lacking full Unicode support, a superscript "o" (often typed as 10^o or via formatting tools) approximates the degree symbol, though it lacks the precise circular glyph. In Google Docs, automatic substitution can be configured under Tools > Preferences > Substitutions to replace user-defined text like "^o" with the degree symbol for consistent conversion during editing.

References

  1. https://mathshistory.st-andrews.ac.uk/Miller/mathsym/geometry/
  2. https://www.nist.gov/pml/owm/si-units-temperature
  3. https://pwg.gsfc.nasa.gov/stargaze/Slatlong.htm
  4. https://www.unicode.org/charts/nameslist/n_0080.html
  5. https://www.ascii-code.com/character/%25C2%25B0
  6. https://www.fileformat.info/info/unicode/char/b0/index.htm
  7. https://www.etymonline.com/word/degree
  8. https://www.merriam-webster.com/dictionary/degree
  9. https://mathworld.wolfram.com/Degree.html
  10. https://www.historytoday.com/archive/history-matters/why-circle-has-360-degrees
  11. https://link.springer.com/article/10.1007/s00407-023-00312-2
  12. https://www.nist.gov/pml/special-publication-330/sp-330-section-5
  13. https://www.mathsisfun.com/geometry/degrees.html
  14. https://sailingissues.com/navcourse1.html
  15. http://aleph0.clarku.edu/~djoyce/elements/bookI/defI9.html
  16. https://www.geeksforgeeks.org/maths/sin-30-degrees/
  17. https://pmc.ncbi.nlm.nih.gov/articles/PMC7120475/
  18. https://nationalmaglab.org/magnet-academy/history-of-electricity-magnetism/pioneers/anders-celsius
  19. https://pmproofreading.com/do-i-need-to-add-a-space-between-number-and-temperature-degree-symbol/
  20. https://www.compart.com/en/unicode/U%2B2109
  21. https://techwritertemplates.com/documentation/reference/spacing-the-degree-symbol/
  22. https://www.editage.com/insights/7-common-errors-in-the-usage-of-symbols-in-scientific-writing
  23. https://www.maptools.com/tutorials/lat_lon/formats
  24. https://ralphsag.com/spirits/
  25. https://camera-wiki.org/wiki/Film_speed
  26. https://music.stackexchange.com/questions/53172/what-does-the-symbol-mean-as-in-f
  27. https://stackoverflow.com/questions/54815692/how-do-i-add-a-degree-symbol-as-part-of-a-uilabel-in-iphone-development
  28. https://gamemath.com/book/orient.html
  29. https://learn.microsoft.com/en-us/typography/develop/character-design-standards/punctuation
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  31. https://www.iso.org/obp/ui/#iso:std:iso:80000:-5:ed-2:v1:en
  32. https://www.bipm.org/documents/20126/41483022/SI-Brochure-9-EN.pdf
  33. https://cmosshoptalk.com/2023/08/29/chicago-style-workout-79-some-technical-abbreviations/
  34. https://www.scribd.com/document/457281953/Degree-symbol
  35. https://www.bipm.org/en/committees/cg/cgpm/13-1967/resolution-3
  36. https://www.unicode.org/charts/PDF/U0080.pdf
  37. https://www.unicode.org/versions/Unicode17.0.0/
  38. https://www.unicode.org/charts/PDF/U2100.pdf
  39. https://cs.stanford.edu/people/miles/iso8859.html
  40. https://stackoverflow.com/questions/10797686/best-way-to-encode-degree-celsius-symbol-into-web-page
  41. https://www.unicode.org/Public/security/latest/confusables.txt
  42. https://earthsky.org/astronomy-essentials/sky-measurements-degrees-arc-minutes-arc-seconds/
  43. https://astronomy.swin.edu.au/cosmos/a/Arcminute
  44. https://support.microsoft.com/en-us/office/insert-degree-symbol-f1d062b6-577f-4fe2-8a51-c6f7a862a8b7
  45. https://support.microsoft.com/en-us/office/insert-ascii-or-unicode-latin-based-symbols-and-characters-d13f58d3-7bcb-44a7-a4d5-972ee12e50e0
  46. https://discussions.apple.com/thread/250609211
  47. https://www.x.org/releases/current/doc/libX11/i18n/compose/en_US.UTF-8.html
  48. http://kbdlayout.info/KBDFRNA/
  49. https://discussions.apple.com/thread/251598924
  50. https://support.google.com/pixelphone/thread/2011440/degree-symbol-when-texting?hl=en
  51. https://support.microsoft.com/en-us/office/insert-a-symbol-in-word-2a061ae9-5a6c-4407-b618-8dc3c9fd4f44
  52. https://support.microsoft.com/en-us/topic/how-to-use-special-characters-in-windows-documents-ec1a4e84-706e-67a5-e52b-e3ebab90313f
  53. https://support.apple.com/guide/mac-help/use-emoji-and-symbols-on-mac-mchlp1560/mac
  54. https://www.w3.org/TR/html401/sgml/entities.html
  55. https://learn.microsoft.com/en-us/answers/questions/4867627/how-to-replace-o-with-the-degree-symbol
  56. https://support.google.com/docs/thread/223897415/trying-to-use-preferences-substitution-to-add-the-degree-symbol-and-either-f-or-c?hl=en
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