500 Series Selection:
|1) 9000/530 (1982)|
|2) 9000/540 (1982)|
|3) 9000/520 (1982)|
|4) 9000/550 (1985)|
The 500 Series was introduced in 1982 with the 9020. The 9020 was HP's first commercial 32-bit desktop computer (the company had abandoned its 32-bit "Omega" prototype computer a dozen years earlier). It was also the first RISC computer made by HP, based on the FOCUS chip (before the advent of the Spectrum PA-RISC CPUs), running at 18 MHz. The 500 Series computers were also the first HP computers to run HP-UX.
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