This is the HP 11C which was introduced to the calculator buying consumer in 1981 and was discontinued in 1989. The 11C is a scientific programmable calculator and had a retail price of $135.00 though by 1989 its price had dropped to $56.00. It featured a landscape liquid crystal display …
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: If you really want to learn …
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 …
