Monostable multivibrators, also known as one-shots, are digital devices similar to flip-flops, but with only one stable state where they remain until triggered by an input signal.

IC timers are semiconductor circuits that generate or set timing for electronics circuits.

IC phase-locked loops (PLL) are closed-loop frequency controls that are based on the phase difference between the input signal and the output signal of a controlled oscillator.

Flip-flops are digital logic devices that synchronize changes in output state (1 or 0) according to a clocked input.

Crystals are naturally occurring materials that can be induced to resonate (vibrate) at an exact frequency.

Specialty IC timing devices are specialty or proprietary products related to IC timing devices.

Electronic counters and electronic timers are completely electronic units for performing a variety of counter or timer functions.