UPS
Definition:
An Uninterruptible Power Supply, or UPS, is a device that can supply battery power to any electrical devices plugged into it. You will typically find a UPS connected to a computer or server to keep it running during a power outage. Battery time varies for each UPS and is usually proportional to the price tag. A smaller, home-based UPS usually provides enough battery power to sound an alarm and give a person enough time to save open files and safely shut down his or her computer. Conversely, an enterprise UPS will provide enough battery power for an entire room full of servers to run for an extended period of time.
Here's a word you may not know...
CAPTCHA
CAPTCHA stands for Completely Automated Public Turing test to tell Computers and Humans Apart and is a spam prevention tool used on Internet web sites. CAPTCHA commonly appears on blog sites as a series of random letters or numbers, sometimes with a squiggly line through them, that a human must replicate before submitting a comment on the blog site.
This extra step of human intervention prevents malicious robots or scripts from automatically submitting spam comments on a blog without the author's permission. In theory, CAPTCHA numbers and letters are unreadable by computers meaning a comment can only be submitted if a human verifies the numbers and letters.
