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System time. In computer science and computer programming, system time represents a computer system's notion of the passage of time. In this sense, time also includes the passing of days on the calendar. System time is measured by a system clock, which is typically implemented as a simple count of the number of ticks that have transpired since ...
Clock rate. Microprocessor clock speed measures the number of pulses per second generated by an oscillator that sets the tempo for the processor. It is measured in hertz (pulses per second). In computing, the clock rate or clock speed typically refers to the frequency at which the clock generator of a processor can generate pulses, which are ...
v. t. e. The Network Time Protocol (NTP) is a networking protocol for clock synchronization between computer systems over packet-switched, variable- latency data networks. In operation since before 1985, NTP is one of the oldest Internet protocols in current use. NTP was designed by David L. Mills of the University of Delaware.
Unix time[a]is a date and time representation widely used in computing. It measures time by the number of non-leap secondsthat have elapsed since 00:00:00 UTCon 1 January 1970, the Unix epoch. In modern computing, values are sometimes stored with higher granularity, such as microsecondsor nanoseconds.
The year 2038 problem (also known as Y2038, [1] Y2K38, Y2K38 superbug or the Epochalypse[2][3]) is a time computing problem that leaves some computer systems unable to represent times after 03:14:07 UTC on 19 January 2038. The problem exists in systems which measure Unix time —the number of seconds elapsed since the Unix epoch (00:00:00 UTC ...
Computer processors generally are overclocked by manipulating the CPU multiplier if that option is available, but the processor and other components can also be overclocked by increasing the base speed of the bus clock. Some systems allow additional tuning of other clocks (such as a system clock) that influence the bus clock speed that, again ...
Another generalization of the conventional flip-flop is a memory element for multi-valued logic. In this case the memory element retains exactly one of the logic states until the control inputs induce a change.[33] In addition, a multiple-valued clock can also be used, leading to new possible clock transitions.
Clock signal. In electronics and especially synchronous digital circuits, a clock signal (historically also known as logic beat) [ 1 ] is an electronic logic signal (voltage or current) which oscillates between a high and a low state at a constant frequency and is used like a metronome to synchronize actions of digital circuits.