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  2. System time - Wikipedia

    en.wikipedia.org/wiki/System_time

    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 ...

  3. Unix time - Wikipedia

    en.wikipedia.org/wiki/Unix_time

    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.

  4. Clock rate - Wikipedia

    en.wikipedia.org/wiki/Clock_rate

    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 ...

  5. Vietnamese language - Wikipedia

    en.wikipedia.org/wiki/Vietnamese_language

    Vietnamese (tiếng Việt) is an Austroasiatic language spoken primarily in Vietnam where it is the national and official language. Vietnamese is spoken natively by around 85 million people, [ 1 ] several times as many as the rest of the Austroasiatic family combined. [ 5 ]

  6. CPU time - Wikipedia

    en.wikipedia.org/wiki/CPU_time

    CPU color time for program P1. CPU time (or process time) is the amount of time that a central processing unit (CPU) was used for processing instructions of a computer program or operating system. CPU time is measured in clock ticks or seconds. Sometimes it is useful to convert CPU time into a percentage of the CPU capacity, giving the CPU usage.

  7. Atomic clock - Wikipedia

    en.wikipedia.org/wiki/Atomic_clock

    Clock mechanism. [edit] An atomic clock is based on a system of atoms which may be in one of two possible energy states. A group of atoms in one state is prepared, then subjected to microwave radiation. If the radiation is of the correct frequency, a number of atoms will transition to the other energy state.

  8. Epoch (computing) - Wikipedia

    en.wikipedia.org/wiki/Epoch_(computing)

    Epoch (computing) In computing, an epoch is a fixed date and time used as a reference from which a computer measures system time. Most computer systems determine time as a number representing the seconds removed from a particular arbitrary date and time. For instance, Unix and POSIX measure time as the number of seconds that have passed since ...

  9. Computer - Wikipedia

    en.wikipedia.org/wiki/Computer

    A computer is a machine that can be programmed to automatically carry out sequences of arithmetic or logical operations (computation). Modern digital electronic computers can perform generic sets of operations known as programs. These programs enable computers to perform a wide range of tasks. The term computer system may refer to a nominally ...