HP-85A

HP-85A  1980    $3,250[6]       16 K RAM, 32 K ROM; 5" CRT, 32×16 text or 256×192 graphics; tape drive, printer

HP-83   1981    $2,250[7]       same as HP-85 without printer and tape drive

HP-86A  1982    $1,795[8]       external composite monitor, no tape drive or printer;
two interfaces for 9130 floppy and one Centronics printer port built in; 64 K RAM

HP-87   1982    $2,495  9" 80×16 (256×128) display, no printer, no tape, built-in HPIB; 32 K RAM

HP-85B  1983    $2,995[9]       update to HP-85A; 64 K RAM (32 K program/variables, 32 K RAM disk;
I/O, EDISK, and Mass Storage ROM built in 

HP-86B  1983    $1,595[10]      update to HP-86; built-in HPIB instead of diskette and Centronics ports; 128 K RAM; EDISK ROM built-in 

HP-87XM         1983    $2,995[11]      update to HP-87; built-in HPIB; 128 K RAM 

HP-9915A/B      1980    $1,675[12]      industrial rack-mount version of HP-85A/B without screen or keyboard, I/O ROM and Program Development ROM built in