The HP-22S is a calculator that is Algebraic scientific comparable to the HP-32S. A solver was included instead of programming, but very well implemented. Suffered from the same constraints as the 32S by lacking enough RAM for serious use. Still a very good calculator and feature set. Included TVM and units conversions. Single letter variable names, but with somewhat less than 1/2 K of RAM this is not a serious issue.
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