OS/2 is a proprietary computer operating system for x86 and PowerPC based personal computers. It was created and initially developed jointly by IBM and Microsoft, under the leadership of IBM software designer Ed Iacobucci, [2] intended as a replacement for DOS. The first version was released in 1987.

在DOS于PC上的巨大成功后，以及GUI图形化界面的潮流影响下，IBM和Microsoft共同研制和推出了OS/2这一当时先进的个人电脑上的新一代操作系统。最初它主要是由Microsoft开发的，由于在很多方面的差别，微软最终放弃了OS/2而转向开发Windows系统。

OS/2是由微軟和IBM公司共同創造，後來由IBM單獨開發的一套操作系統。OS/2是「 Operating System/2 」的縮寫，是因為該系統作為IBM第二代個人電腦 PS/2系統產品線的理想操作系統引入的。

2025年4月7日 · OS/2 User Meet, Cologne, Germany - Nov 16 Tuesday, 08 October 2024 16:03; Warpstock 2024 - Videos Wednesday, 02 October 2024 21:14; Come join us for Warpstock 2024 in Pittsburgh! Tuesday, 25 June 2024 19:58 [Arca Noae] Reminder: Warpstock Europe 2024, Rheine, Germany, June 7-9 Sunday, 19 May 2024 20:14;

IBM OS/2, operating system introduced in 1987 by IBM and Microsoft to operate the second-generation line of IBM personal computers, the PS/2 (Personal System/2). Although initially IBM and Microsoft worked together on OS/2, the companies parted ways after disputes arose regarding how the system would be upgraded.

The Golden Years—the most successful version of OS/2. In October 1994 IBM released OS/2 Warp, the most popular version of OS/2 and arguably one of the coolest operating systems ever (Warp Connect even said so on the box—“The totally cool way to run and network your computer”—so it must be true).

OS/2（OperatingSystem/2——最初在IBM德国也有BS/2foroperatingsystem/2）是一个多任务单用户操作系统，用于带有x86处理器的个人计算机，后来也有PowerPC处理器。 它最初是由IBM和Microsoft联合开发的，作为DOS的继承者。

2025年4月11日 · Tandon and Compaq have the same problem, but Intel MS OS/2 1.21 does not. IBM’s OS/2 1.2 SE or EE likewise does not have this trouble. The problem is usually caused by having a CD-ROM on a secondary disk controller (IDE or otherwise).

OS/2 1.0 was a 16-bit multi-tasking protected-mode operating system with pre-emptive scheduling, multi-threading, dynamic linking, and virtual memory.