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.

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

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

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

Counter and timer boards are computer cards that perform digital counting and/or timing functions

Time delay relays and solid state timers use solid state electronic devices to provide a time delay

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.