Diagram of Hewlett-Packard Calculator Evolution-35A ==========-21A ==-31E ==========-10C ==================-20S ==     /-21S    /     ==-22S    /-45A ========== -27A ==-32E ==========-11C ==-27S ===========-46A-32C      /    \     /     \-55A ==========-25A ==-33E ========      =-32S == 32SII-25C-33C     \-95C      \-29C ==-34C ==========-15C ==================-42S-10A ==-19C    \/      /     \ /-65A =========      X      \     / \-67A == -41C ========== -41CX ==|==============48SX === 48S-97A-41CV     \|     /  48G-41opt1      \|    /  48GX-16C ==-28C ==-28S  48G+   38Gto -27A       /      /-19B ==19BII-80A ==-92A \/      /-38E ==-38C =\           /=-17B ==17BII-81A      =-22A =      -12C ==-18C =-70A ========/      \========-37E =/     \=========14B      \========-10B-85A ==-85F ==========-75C ==========-71B =====from 19BII    \ -86A,-86B-75D  \  \      -87A   \   \    \    \-97S ========================== -94D ==================95LX-94E95LX1MB-94F 100LX       100LX2MBNot (yet) included: -01A -83A -83F -85B -87XM -91A