What is the time of the system?

System time is a representation of the way computers measure time. Time and calendar date displayed by the operating system (OS) or this has occurred with different programming languages, is generated by system time. This is done by a system clock that calculates ticks, because any starting point known as an epoch. Each operating system uses its own epoch and ticks that represent different time lengths. Determining how many ticks have passed from the epoch and then transformed them into seconds, the computer can draw the current time and date.

soon personal computers (PC) had no way to watch time. The first models that have this function were made by International Business Machines (IBM). Since then, all PC and OSS have included some way to monitor time and convert them to a form recognizable for people. With the advent of the network and especially the Internet, the PC has also become capable of the system of the system time to take into account the time zones. It was also possible to update the system systemhim to match the central server.

The way computers usually measure time is counting ticks from any starting point. Ticks are not generally converted to measuring time useful to humans, because each operating system allows you to go through a different amount of time between them. Some systems calculate one tick for every 100 nanoseconds, while others correspond to one second. If the system works in parallel for a sufficiently long time, it is possible that the number of ticks will reach the maximum number of numbers allowed and wrap to zero. In some cases, this may cause the system's instability.

Each system also has a different initial date from which ticks are calculated. Some operating systems use an epoch that starts at 1601 ° and has a range that lasts until 2099. Others, for example, use the basic input/output (BIOS)ual day. In any case, it is possible for the computer to calculate how many ticks have occurred from the beginning of the epoch, and then convert this number to the date and time of the calendar that is useful to the human user. The distinction that the system time is able to return depends on the length of the tick, so some systems can report in milliseconds while others are limited to the next second.