ProLiant

ProLiant is a brand of server computers that was originally developed and marketed by Compaq, Hewlett-Packard (HP), and currently marketed by Hewlett Packard Enterprise (HPE). ProLiant servers were first introduced by Compaq in 1993, succeeding their SystemPro line of servers in the high-end space.

After Compaq merged with HP in 2002, HP retired its NetServer brand in favor of the ProLiant brand. HP ProLiant systems led the x86 server market in terms of units and revenue during first quarter of 2010. HPE now owns the ProLiant brand after HP split up into two separate companies in 2015.

The HP/HPE ProLiant servers offer many advanced server features such as redundant power supplies, Out-of-band management with iLO or Lights-out 100, Hot-swap components and up to 8-Socket systems.

The ProLiant series of server computers was originally introduced in 1993 by Compaq to replace their former SystemPro line of servers in the high-end space, with the mid-range space of the SystemPro being succeeded by the ProSignia line of servers and business PCs. The ProLiant and ProSignia brand of servers coexisted with each other up until the ProSignia brand was discontinued in 2000.

On January 31, 2000, Compaq introduced the ProLiant ML and DL line of servers as part of a restructuring of its existing line of ProLiant servers into two separate and distinct lines to suit different needs in the server market. The ML (Modular Line) line of servers features a modular design that is designed for maximum system expansion, while the DL (Density Line) line of servers consists of powerful, density-optimized servers designed for rack mounted use. Though not officially labeled as such, this generation of ProLiant servers is also referred to as "Gen1". "Gen2" ProLiant servers were produced by Compaq from 2001 to 2002.

In May 2002, Compaq was acquired by HP. As part of the merger with Compaq that year, HP discontinued their NetServer line of servers that had been produced the same year ProLiant servers debuted in the early 1990s in favor of Compaq's ProLiant line of servers. The 2002 merger also brought in other products that were made or offered by Compaq at the time, such as the NonStop line of servers (which were formerly owned by Tandem Computers, inc. and then brought out by Compaq in 1997), the Presario line of personal computers, and the iPAQ line of personal digital assistant (PDA) devices.

Following the 2002 merger between Compaq and HP, "Gen2" ProLiant servers were produced by HP and replaced Compaq-provided software and tools with HP-provided ones. Throughout the rest of the 2000s up until the early 2010s, Gen3, Gen4, Gen5, Gen6, and Gen7 ProLiant servers were produced.

In February 2012, HP announced the ProLiant Gen8. In July 2013, HP announced a new blade server-based ProLiant, the HP Moonshot Server.