jTSR is a utility which takes about 1500 bytes of memory when resident and blanks the screen on hotkey or after specified amount of time when there hasn't been any keyboard activity, turns the PC speaker's 'BEEEEEP!' into soft 'bl-bl-bl-bl', sets the speed of keyboard constantly to maximum, can fake keystrokes, hide the mousecuror and disable video, prevents the keyboard buffer from getting full and seeds random garbage to R. Walking-Owl's NoiseSYS.