This is the Hewlett-Packard 41cx or HP-41cx calculator.It is part of the HP 41 family which was introduced in 1979. There was the 41C, 41CV and the 41CX. The 41CX was introduced in 1983 and finally discontinued in 1990. It had numerous features including: Up to 6.4K RAM Up to …
Introduced in 1978 and discontinued in 1983 the HP 37E was one of HP’s lower end business calculators. It replaced their HP 22 and retailed for around $75.00. It was not programmable but did have quite a few pre-programmed functions available. And, it had Factorial and 1/x functions. It utilized …
