Deb or DEB may refer to:
Debian (/ˈdɛbiən/) is a Unix-like computer operating system that is composed entirely of free software, most of which is under the GNU General Public License and packaged by a group of individuals participating in the Debian Project.
A debit card (also known as a bank card or check card) is a plastic payment card that can be used instead of cash when making purchases.
Deborah Ann "Debby" Ryan (born May 13, 1993) is an American actress and singer. Ryan started acting in professional theatres at the age of seven; in 2007 she appeared in the Barney & Friends straight-to-DVD film Barney: Let's Go to the Firehouse and then was discovered in a nationwide search by Disney.
Mary Frances "Debbie" Reynolds (April 1, 1932 – December 28, 2016) was an American actress, singer, businesswoman, film historian, and humanitarian, and mother of the actress and writer Carrie Fisher.
In double entry bookkeeping, debits and credits (abbreviated Dr and Cr, respectively) are entries made in account ledgers to record changes in value resulting from business transactions.
The debate over the atomic bombings of Hiroshima and Nagasaki concerns the ethical, legal, and military controversies surrounding the atomic bombings of Hiroshima and Nagasaki on 6 August and 9 August 1945 at the close of World War II (1939–45).