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

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

Electromechanical counters and electromechanical timers accept inputs to operate mechanical display, such as rotating wheels or knobs

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

Mechanical timers are used to actuate devices at the end of a specified time period.

Specialty timers are specialty or proprietary products related to timers and timing devices