The Silicon Jungle by David H. Rothman

8. Is the program picky about the computers it’ll work with? A window

system _may_ need over half a million bytes of RAM and a hard-disk drive storing 5 megabytes. Also, as of this writing, windows seemed geared more to the IBM-style MS-DOS computers than to the older but cheaper CP/M ones. Besides, some companies may not sell windows programs directly to ordinary buyers. Microsoft got various micro manufacturers to bundle the program with their products.