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CAPTCHA

Definition:

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.

Here's a word you may not know...

roaming

Roaming occurs on mobile phones when the mobile phone is communicating with another cellular network outside of its geographic area. If the two cellular networks have an agreement with one another, the mobile phone is allowed to utilize the neighboring network. Some cellular providers charge a premium when placing calls while roaming on another cellular network. Your mobile phone should indicate when it is roaming.