/O S too/ IBM
's successor to the MS-DOS operating system
for Intel 80286
and Intel 80386
It is proof that they couldn't get it right the second time either.
Often called "Half-an-OS".
The design was so baroque
, and the implementation of 1.x so bad, that 3 years after introduction you could still count the major application programs shipping for it on the fingers of two hands, in unary
Later versions improved somewhat, and informed hackers now rate them superior to Microsoft Windows
, which isn't saying much.
See second-system effect
On an Intel 80386
or better, OS/2 can multitask between existing MS-DOS
OS/2 is strong on connectivity and the provision of robust virtual machines. It can support Microsoft Windows
programs in addition to its own native applications.
It also supports the Presentation Manager graphical user interface
supports hybrid multiprocessing
(HMP), which provides some elements of symmetric multiprocessing
(SMP), using add-on IBM software called MP/2.
OS/2 SMP was planned for release in late 1993.
After OS/2 1.x the IBM
partnership split. IBM continued to develop OS/2 2.0, while Microsoft developed what was originally intended to be OS/2 3.0 into Windows NT
. In October 1994, IBM released version OS/2 3.0 (known as "Warp") but it is only distantly related to Windows NT
. This version raised the limit on RAM from 16MB to 1GB (like Windows NT).
IBM introduced networking with "OS/2 Warp Connect", the first multi-user version.
OS/2 Warp 4.0 ("Merlin") is a network operating system