ACT Apricot DEC Rainbow 100 Hewlett-Packard HP-150 Seequa Chameleon List of early non-IBM-PC-compatible PCs IBM PC compatible Compaq IBM PCs MS-DOS
Because MS-DOS was available as a separate product, some companies attempted to make computers available which could run MS-DOS and programs. These early machines, including the ACT Apricot, the DEC Rainbow 100, the Hewlett-Packard HP-150, the Seequa Chameleon and many others were not especially successful, as they required a customized version of MS-DOS, and could not run programs designed specifically for IBM's hardware. (See List of early non-IBM-PC-compatible PCs.)
The first truly IBM PC compatible machines came from Compaq, although others soon followed.
