Is the vintage TI-57 calculator a nonpareil? Consider that it came on the market in mid 1977 and then try the following demonstration program. Starting from turnon enter the program by pressing in sequence:
LRN
2 2nd Exc SST
2nd Lbl 0 R/S SST 5 R/S LRN RST R/S LRN
6 BST 2nd Ins LRN RST R/S LRN
5 BST 2nd Ins LRN RST R/S LRN
2 BST 2nd Ins LRN RST R/S LRN
4 BST 2nd Ins LRN RST R/S LRN
2 BST 2nd Ins LRN RST R/S LRN
7 BST 2nd Ins LRN
To run the program press GTO 2nd 0 4 R/S