IBM's OS/2 has a great history as a workstation operating system, it was a major alternative OS in the '90s. At its peak time in the mid-'90s OS/2 had about 2 million users but the Windows NT and Windows 95 releases broke its further development. This year
Serenity Systems has released a new client version of OS/2. This article will introduce you to what OS/2 is all about. You will learn its history, its user interface, and its power under the hood. The article is also accompanied by a number of screenshots.
Plus, on Win2k/XP this feature takes two menu options (Open and Open With), while OS/2 uses only one option and it is much faster to access. On OS/2 you only got the 'Open' and at the right of the Open you got an arrow inside a rectangle (see one of the screenshots in the article, in the third page). If you click on the word 'Open', the file will open with the default assosiation program, if you click on the arrow inside the rectangle, which is just 20 pixels on the right, a submenu opens instantly which lists all the assosiated apps and then you click which app you want to open your file.
BeOS also has that instant submenu called 'Open With', but as Win2k/XP has two options in its menu: 'Open' and 'Open As'. OS/2 does the same job as XP and BeOS but with a single click, because it utilizes this weird widget, the arrow inside the rectangle, a widget used a lot across OS/2.