First Generation
HP 9100 (1968) - HP's first desktop calculator - RPN, magnetic card storage - original price $5,000 ($36,000 in 2019 dollars)
Second Generation
HP 9810 (1971) - Keystroke programmable, magnetic card storage - original price $2975 ($18,800 in 2019 dollars)
HP 9820 (1972) - HPL (algebraic input) - original price $4975 ($30,500 in 2019 dollars)
HP 9830 (1972) - BASIC in ROM, cartridge tape - original price $5975 ($36,500 in 2018 dollars)
Third Generation
HP 9815 (1975) - Mini-cartridge tape storage, 6800 processor - original price $2900 ($14,00 in 2019 dollars)
HP 9825 (1976)
HP 9835 (1978)
HP 9845 (1977)