| 摘要 |
<p>A keyboard is provided in a system which operates to detect the correct password which is entered into the system by actuating keys on the keyboard. The keyboard consists of a matrix (33) of keys and variable visible indicia of integers and letters. The matrix is a rectangular array of keys (10A to 10I) and variable visible indicia are shown on display means, such as LEDs (30A-30I), associated with the respective keys. The symbols appearing on the LEDs in the matrix are subjects of the code alphabet from which the string of symbols for the password is selected.</p> |
