Any kind of information could be stored there, such as program icons, descriptions, cataloging information, etc. Each file or directory could have up to 64K of Extended Attributes (EAs) associated with it. File names could be up to 255 characters long and the set of acceptable characters was larger than in FAT-among others, it included the space character. The new filesystem overcame most of the limitations of the FAT filesystem and made OS/2 more practical for use as a server system. HPFS was designed from the ground up by Gordon Letwin, the Chief Architect of OS/2 at Microsoft. The first IFS which shipped with OS/2 was HPFS, the High-Performance File System. A major addition to the OS kernel was the support for installable file systems, or IFSs. The GUI was much improved and had a much cleaner and more modern look (later used by Windows 3.0). In some ways it was what OS/2 1.0 should have been, or at least implemented all the major features that IBM and Microsoft had been promising since mid-1987. At any rate, both companies continued developing OS/2. IBM, on the other hand, had nothing to gain from Windows and continued to push OS/2. The initial plan was to de-emphasize Windows in favor of OS/2, but Microsoft was reconsidering that decision when OS/2 failed to sell in large numbers. OS/2 1.1 was not nearly as successful as Microsoft and IBM had hoped and it was unclear how to proceed. At the same time, work was underway on a 32-bit OS/2 version (initially referred to as OS/2 386), eventually released by IBM as OS/2 2.0. In late 1988, Microsoft started working on NT, initially developed as NT OS/2 (also known as as “Portable OS/2” on the IBM-Microsoft product roadmap) and ultimately released as Windows NT. OS/2 1.2 and 1.3 were developed at a time when the relationship between IBM and Microsoft was becoming severely strained. The Struggle for Attention-OS/2 tries but largely fails to attract users
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