Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
The chessboard example. Both chessboards code for two colors: black and white. A reading error occurs if one moves from one square to the horizontally or vertically adjacent square; a coding error is mistaking black for white (or vice versa). Clearly, the configuration on the left is much more likely to result in error than the one on the right.
