; HP-41C codes +------+------+------+------+------+------+------+------+------+------+ | [11] | [12] | [13] | [14] | [15] | [16] | [17] | [18] | [19] | [10] | f | Sum- | y^x | x^2 | 10^x | e^x | ISG | x=y? | SF | CF | FS? | | Sum+ | 1/x | Sqrt | LOG | LN | CHS | - | 7 | 8 | 9 | a | A | B | C | D | E | K | L | M | N | O | +------+------+------+------+------+------+------+------+------+------+ | [21] | [22] | [23] | [24] | [25] | [26] | [27] | [28] | [29] | [20] | f | CLS | % | SIN-1| COS-1| TAN-1| RTN |x<=y? | BEEP | P->R | R->P | | x<>y | Rv | SIN | COS | TAN | EEX | + | 4 | 5 | 6 | a | F | G | H | I | J | P | Q | R | S | T | +------+------+------+------+------+------+------+------+------+------+ | [31] | [32] | [33] | [34] | [35] | | [37] | [38] | [39] | [30] | f | T+X | COR | ASN | BST |CLx/A | CAT | x>0? | FIX | SCI | ENG | | USR | PGM | XEQ | SST | <-- |ENTER | * | 1 | 2 | 3 | a | | | = | | | | U | V | W | X | +------+------+------+------+------+ [36] +------+------+------+------+ | [41] | [42] | [43] | [44] | [45] | | [47] | [48] | [49] | [40] | f | CLK | | TIME | LBL | GTO | | x=0? | Pi | LSTx | VIEW | | ON | f | a | STO | RCL | | / | 0 | . | R/S | a | | | | ? | : | SPC | Y | Z | , | | +------+------+------+------+------+------+------+------+------+------+