Evans Hall is the statistics, economics, and mathematics building on the campus of the University of California, Berkeley.

Evans Hall also served as the gateway for the entire west coast's ARPAnet access during the early stages of the Internet's existence; at the time, the backbone was a 56 kbit/s line to Chicago.

Because of its proximity to the engineering school, and the location of both the departments of Computer Science, and Mathematics, Evans Hall was the building in which the original vi text editor was programmed, as well as the birthplace of Berkeley Unix (BSD), and Rogue, which was further developed there by Glenn C Wickman, and Michael Toy. Rogue's origins included the curses library, which Rogue was originally written to test. Additionally, both Ingres and Postgres were originally coded in Evans, under Prof. Michael Stonebraker's direction.

The TCP/IP protocol stack was the product of work at many institutions; the software backbone was developed at Evans Hall in 1981, in the Berkeley sockets library, and it (and its descendants) still power the Internet today.

In 1979, in Evans Hall, Berkeley graduate student Eric Allman wrote the Delivermail program, eventually turning it into Sendmail, the ubiquitous email program on the Internet.

Evans Hall was the site of one of the world's most advanced computer architecture groups in the 1980s. In this building, under the supervision of Professors David Patterson and Randy Katz, the Berkeley RISC series of processors were developed, pioneering Reduced Instruction Set Computing. The Berkeley RISC architecture was commercialized by Sun Microsystems as the SPARC Architecture, and inspired the ARM architecture used in about 98% of all cellphones.

Professors Katz and Patterson, along with Katz' student Garth Gibson also devised the Redundant Array of Inexpensive Disk architecture, widely used in computing systems today.

Professor William "Velvel" Kahan devised the IEEE 754 floating-point architecture standard used in every processor today.