is a brand of server computers that was originally developed and marketed by Compaq
Compaq Computer Corporation is a personal computer company founded in 1982. Once the largest supplier of personal computing systems in the world, Compaq existed as an independent corporation until 2002, when it was acquired for US$25 billion by Hewlett-Packard....
. After Compaq merged into Hewlett-Packard
Hewlett-Packard Company or HP is an American multinational information technology corporation headquartered in Palo Alto, California, USA that provides products, technologies, softwares, solutions and services to consumers, small- and medium-sized businesses and large enterprises, including...
(HP), HP continued to develop and market these servers as HP ProLiant. ProLiant systems lead the x86 server market in terms of units and revenue.
ProLiant servers are separated into four main product lines - ML, DL, BL and SL
- which denote form factor. The ProLiant ML line comprises tower
A tower is a tall structure, usually taller than it is wide, often by a significant margin. Towers are distinguished from masts by their lack of guy-wires....
based servers with capacity for internal expansion of disks and interconnects, the DL line comprises general purpose rack mount servers, the BL line comprises blade
A blade server is a stripped down server computer with a modular design optimized to minimize the use of physical space and energy. Whereas a standard rack-mount server can function with a power cord and network cable, blade servers have many components removed to save space, minimize power...
servers which fit within the HP BladeSystem
BladeSystem is a brand name used by Hewlett Packard for Blade server machines....
, and the SL line comprises dense rack mount servers for scale out environments.
ProLiant servers are also split into several series which denote processor
The central processing unit is the portion of a computer system that carries out the instructions of a computer program, to perform the basic arithmetical, logical, and input/output operations of the system. The CPU plays a role somewhat analogous to the brain in the computer. The term has been in...
configuration. The 100, 200, 300 and 400
series comprise single and dual socket capable systems, the 500 and 600
series comprise quad socket capable systems, and the 700
series comprises eight socket capable systems. The new 900
series also include eight sockets, supporting up to
80 cores and up to
4TB RAM. Models with 0 in the last digit use Intel processors; models with 5 in the last digit use AMD processors.