When a computer or other electrical device is switched on, POST (or P.O.S.T.) is a sequence of system tests that are performed. The test's outcomes may be logged inwardly, transmitted through blinking Lights, or presented on a screen. On computer systems, the POST process starts up right when the system boots. If every test is successful, the remaining steps of starting are carried out immediately.

Every time a Mac or a Windows Laptop boots up or restarts, a POST is launched. The hardware is examined during the analysis to ensure that the CPU, Memory, and storage devices are all operating properly. The starting procedure may slow or stop entirely if an error occurs during the POST. The mistake may also be visible on the monitor. POST failures are frequently shown on the BIOS status page on Computers. System messages like "System RAM failed at position" or obscure numbers like "08" for faulty memory may be produced for these errors. POST failures on Macs are frequently represented by a straightforward visual, such as a fractured folder symbol that denotes that no accessible drive was discovered.

Sometimes POST failures happen even before the computer interface comes on. Error codes may be produced in this situation via blinking LED lights or auditory tones. When faulty Memory is met during initialization, for instance, an Apple iMac will hear three consecutive tones, then stop for five seconds before repeating the tones. When POST mistakes are discovered, the majority of Computers also sound, though each maker employs a different set of numbers.

Only computer techs regularly use the rather specialized word POST. However, knowing it will help you better comprehend any problem notifications that may appear on laptops or other electronic devices, so it is a useful word to know. If a POST error prevents your computer from booting up, you can use another device to research the meaning and origin of the error, perhaps from the manufacturer's website. After taking the necessary action, such as deleting a RAM module or reinstalling the video card, you can attempt turning on your computer once more.

Another way to send HTML form variables from one website to another without showing them in the URL field is by using the "POST" technique. The "GET" technique is an option that appends the numbers to the Address.