Cupertino, CA: Apple Computer, Inc., (1987). Spiral Bound. Three volumes in printed wraps ; two spiral bound and one staple bound, 8vo (9 inches tall), pp. [vol 1 Macintosh Plus Owner's Guide] xv, (xvi), 234 ; [vol 2 Macintosh Utilities User's Guide] xi, (xii blank), 109 ; [vol 3 MultiFinder User's Guide] viii, 35 - all 3 volumes indexed and illustrated with line drawings throughout, two volumes retain the original mail-in Apple feedback computer cards at rear. Volumes with occasional soil and some toning, Macintosh Plus Owner's Guide with a corner crease to front cover. Very Good. Item #2440
How to care for and operate your ripe Apple, along with "MultiFinder, introduced on August 11, 1987, further extended the system in a number of significant ways. In addition to giving each application CPU time, it provided a way for windows from different applications to coexist by using an application layering model ... – a great improvement over the previous systems, which could only run one application at a time." Wikipedia.
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