timers

n.

a timepiece that measures a time interval and signals its end

(sports) an official who keeps track of the time elapsed

同义词：timekeeper

a regulator that activates or deactivates a mechanism at set times

Why TCP timers don't work well
Scalable Timers for Soft State Protocols
Monthly Measurement of Daily Timers
Soft timers:efficient microsecond software timer support for network processing
Soft timers: efficient microsecond software timer support for network processing
Impetuous Youngsters and Jaded Old-Timers: Acquiring a Reputation for Learning
Improving the Status of Part-Timers in Higher Education by Judith M. Gappa; David W. Leslie
The Invisible Faculty. Improving the Status of Part-Timers in Higher Education.
INVESTIGATING & IMPROVING THE RELIABILITY AND REPEATABILITY OF KEYSTROKE DYNAMICS TIMERS
How people get into mental health services: stories of choice, coercion and "muddling through"from "first-timers".