File:Vintage Hewlett-Packard Model HP-45 Advanced Scientific Pocket Calculator, HP's Third Handheld Electronic Calculator, Introduced in 1973 and Discontinued in 1976 (38772251491).jpg - Wikimedia Commons
The HP 45: A "Shift" in Technology - Hewlett-Packard History
HP 45
Hewlett Packard HP 45 calculator | eBay
HP-45
HP 45 Vintage Calculator - YouTube
HP-45
File:Vintage Hewlett-Packard Model HP-45 Advanced Scientific Pocket Calculator, HP's Third Handheld Electronic Calculator, Introduced in 1973 and Discontinued in 1976 (24898239118).jpg - Wikimedia Commons
What's your favorite non-programmable HP calculator?
The HP 45: A "Shift" in Technology - Hewlett-Packard History
Vintage Hewlett Packard 45 Scientific Calculator for Collectors - Calculators - BMI Surplus
HP45 Calculator
Vtg Hewlett-Packard HP-45 Calculator Original Leather Case Manual UNTESTED AS-IS | eBay
HP-45 Pocket scientific calculator | 102618897 | Computer History Museum
Other Pockets
Eddie's Math and Calculator Blog: Retro Review: Hewlett Packard HP 45
Hewlett Packard HP45 calculator w/ Power Adapter **Cable Issue** No Battery | eBay
Hewlett-Packard HP 45 Electronic Calculator, 1973 | Science Museum Group Collection
The early history of HP calculators | HPE
HP-45 Crystal Modification
DigiBarn Calculators: HP 45 in original case
The early history of HP calculators | HPE
