POST may refer to any of the following:
1. Short for power-on self-test, the POST is a test the computer must complete to verify all hardware is working properly before starting the remainder of the boot process. The POST process checks computer hardware, like RAM (random-access memory), hard drive, CD-ROM (compact disc read-only memory) drive, keyboard, etc., to ensure everything works correctly.
If all hardware passes the POST, the computer continues the boot up process and may generate a single beep sound. If POST is unsuccessful, it generates a beep code to indicate the error encountered, and the computer will not boot up. All POST errors relate to hardware issues with one of the components in the computer.
Why is a POST necessary?
If a computer were not to run through a POST and verify all required hardware is working, it would cause other problems with the computer. For example, if the computer had RAM problems, all other software could have problems, and you wouldn't know it was due to the RAM. Verifying the necessary hardware passes tests ensures your computer runs more stable.
2. With a message board, comment section, or social network, a post is a message, such as text or images, published online by a user. "To post" is also a verb, meaning to publish a message. For instance, "You can click here to post this message," or, "Many forum users are posting frequently."
For example, you can post a message on your Facebook page to tell your family and friends what you did on vacation. You can also post a status update to tell others what you are doing.
3. The Internet domain suffix .post is exclusively for the postal sector.