The 10 Worst PCs of All Time

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#5. IBM PS/1 (1990-1994)

The PS/1 was IBM's second stab at creating a consumer PC for the masses, following the disastrous PCjr (#13 on our list of the all-time worst products), but it wasn't much of an improvement.

Among other brilliant moves, the original PS/1 featured a power supply inside the monitor, which made swapping out displays impossible, and it couldn't accept standard ISA cards, preventing upgrades. (Later models were more compatible.)

In 1994 IBM abandoned the PS/1 and tried again to capture the consumer market by introducing the Aptiva line, but this too was largely a disaster. IBM gave up the whole Aptiva idea in 2000.