0-9 | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z
1. In data equipment, the change from letters to other characters, or vice versa. (188) 2. In typewriting or typesetting, the change from lower case letters to upper case letters, or vice versa.