A numeric digit used to ensure that account numbers are entered accurately into the computer. Using a formula, a digit is calculated from each new account number, which is then made part of that number, either at the end, the beginning or somewhere in the middle of the number.
When an account number with the check digit is entered, the data entry program recalculates the check digit and compares it to the check digit entered. If the digits are not equal, the account number is considered invalid.
When an account number with the check digit is entered, the data entry program recalculates the check digit and compares it to the check digit entered. If the digits are not equal, the account number is considered invalid.
 | Reproduced with permission from Computer Desktop Encyclopedia. Copyright (c) 1981-2009 The Computer Language Company Inc. All rights reserved. |
Additional Resources
- Smartplanet: Apple can grab more share by slashing Mac prices
- Macs are expensive - there's really no way to argue that point. But Mac owners - myself included - find enough value in the computing experience to justify the expense. Even with a premium price, Apple has been gaining share, nearing the double-digit mark, but still not...
- Blog posts 2009-11-04
- Elertify your PC with Text to Speech! (Mobile)
- FREE 7 Day Trial - Trial Version is fully functional!Please Download the Trial prior to purchase Elertify your PC with Text to Speech! Do you work with your BlackBerry and a PC? Are you tired of picking up your BlackBerry every 15 seconds to check messages only to discover it's...
- Software downloads 2009-10-28
- Modern banker malware undermines two-factor authentication
- Ok, ill buy that..Yes Two-factor authentication doesnt help avoid the already infected. Now what the bank SHOULD have one other than the user having a fully patched system and AV if hes on Windows is when the website detected that there was activity from another IP address - represented another...
- Discussion threads 2009-09-23
- Google buys reCAPTCHA: Digitize old books and fight spam
- Too Bad ..."They try to distinguish humans from robots when entering form data."Too bad they can't discriminate humans from 3rd World wage slaves decoding them for the spammers :(RE: Google buys reCAPTCHA: Digitize old books and fight spamCool from a machine learning standpoint but does this freak you out since...
- Discussion threads 2009-09-16
- VideoLight - LED Camera Flashlight (Mobile)
- Get this Super Bright Flashlight App for your BlackBerry - VideoLight!This app uses the video camera to turn on the LED light on the back of your BlackBerry.The light will stay on for as long as you want, which is much better than launching the video camera because it turns...
- Software downloads 2009-08-31
- The Google Voice app scandal: is Apple losing control over the iPhone?
- its rather a good thing no technologie suppliers should have any right over what you do with your device ...period ... RE: The Google Voice app scandal: is Apple losing control over the iPhone?SAM: "Anyone who reads this blog regularly knows that I?m a big Apple fan..."What a joke....
- Discussion threads 2009-08-24
- Password-reset flaw haunts WordPress admins
- Open source and PHP at its worstI cannot fathom the design decisions that went into PHP. Maybe that's because there weren't any. That "language" I use that term in the broadest sense here is accident upon accident, quirk upon quirk, patch upon patch. PHP is a complete mess without a...
- Discussion threads 2009-08-11
- PrecisionID Code 39 Barcode Font Package 4.0 (Windows)
- The Code 39 Barcode Font Package contains 6 sizes of TrueType and PostScript fonts, each supplied in normal and text readable format. The package also contains complete documentation, specifications and implementation examples. Some implementations of Code 3 of 9 such as Logmars require a check digit. For this purpose, we...
- Software downloads 2009-07-30
- 2009 Mazda MX-5 Miata Grand Touring
- Photo gallery:2009 Mazda MX-5 Miata Grand TouringThe Mazda MX-5 Miata is the best-selling roadster of all time. With sharp handing and a no-nonsense approach to driving, it's no wonder.For 2009, the MX-5 gains a bit more power and a new look that is either a bit more refined or a...
- Product reviews 2009-07-24
- MessageForward 1.0 (Mobile)
- for BlackBerry Wireless HandheldForward incoming SMS text messages from your BlackBerry to any email account!Features | Screenshots | Supported DevicesFeaturesConveniently check your SMS text messages via email.Avoid situations where you always have to check your phone.Save a backup of all your incoming text messages for future reference.Check your SMS text...
- Software downloads 2009-07-23
- 10 ways to secure the Apple iPhone
- Guest post: TechRepublic's Michael Kassner highlights 10 ways to secure an iPhone. For more posts like this see TechRepublic's 10 Things blog. The Center for Internet Security CIS is well -known for developing security benchmarks for operating systems, applications, network devices, and now the Apple iPhone. I’ve read...
- Blog posts 2009-06-12
- Email service provider: 'Hack into our CEO's email, win $10k'
- A newly launched startup called StrongWebMail is aiming to add a new layer of secure authentication for its customers - phone verification prior to logging in and alert services for potential email compromises. The company is in fact so confident in its approach that it's currently offering...
- Blog posts 2009-06-02
- ImTOO BlackBerry Sudoku (Mobile)
- ImTOO BlackBerry Sudoku is a highly cool and addictive blend of logic and lateral thinking to challenge you to fill a partially completed 9x9 grid with digits 1-9 without repeating any digits in each column, each row and each of the nine 3*3 boxes. This Sudoku is designed for BlackBerry...
- Software downloads 2009-04-21
- What’s a wealthy nation spend its money on?
- What’s a wealthy nation spend its money on?NOT a clue about China....I guess the author of the story has not read that China has been spending BILLIONS on its massive Military...http://www.washingtontimes.com/news/2008/mar/03/china-speeds-pace-of-military-buildup/http://www.boston.com/news/world/asia/articles/2009/01/20/china_fears_containment_as_defense_spending_rises_1232443538/Another case of slighted biased media against the United States.In a free country people can buy what they want, when...
- Discussion threads 2009-01-25
- Internet Inauguration: The Interactive Introduction of the Obama Presidency
- Internet Inauguration: The Interactive Introduction of the Obama PresidencyAm I the only one creeped out by this posterIt looks just a little bit too much like this one.http://www.americanthinker.com/blog/LENIN%203.jpglyvegyde - links to live, inaugural webcastsMy brother and I created a website called lyvegyde (http://www.lyvegyde.com) that provides links to live, online events....
- Discussion threads 2009-01-19
- Zune problems? All should be fine by Midnight
- Zune problems? All should be fine by MidnightSo, by letting your kids and yourself... have an ear-splitting volume of music free day (and hopefully prolonging your hearing, which does NOT recover), Microsoft should be sued?Better I think to thank them for their ineptitude which lead, hopefully, to a day of...
- Discussion threads 2008-12-31
- WARP speed for Windows 7
- WARP speed for Windows 7Core i7 8-core???"8-core dual Core i7"WTF is that?All current Core i7's are quad-core with Hyperthreading. It runs 8 threads, which is NOT the same as an 8-core. The 4 cores run at full speed, but can balance 2 threads each, which can improve efficiency...
- Discussion threads 2008-12-01
- Peet's Card 1.0 (Mobile)
- You're a regular at Peet's Coffee & Tea? Use a pre-paid card to pay for your drinks? Fed up trying to remember the balance on your card, or trying to check it from Mobile Safari before you reach the front of the line? This is the app for you! Keep...
- Software downloads 2008-12-01
- Echosign prepares for tipping point of e-signatures
- Electronic signatures aren't new. In fact, they've been equivalent to written signatures since 2000, under the Federal E-Sign Act. But adoption has been slow. Sure, my tax accountant may be submitting my electronic signature on my tax returns but recently, when it came time to put my out-of-state home on...
- Blog posts 2008-11-18
- Walmart to sell Android G1 at discount. So what?
- Walmart to sell Android G1 at discount. So what?Sure, I'd like $30, too....but if you're trying to convince me that you wouldn't buy the G1 at full-price anyway if no such Walmart discount was available, then I don't buy your argument. It strikes me that $30 is not going to...
- Discussion threads 2008-10-28
Neighboring Terms
Premier Vendor Content Whitepapers, webcasts & resources from our Power Center Sponsors
- New Online Dashboard for IT Leaders
-
Read about top issues IT decision-makers face every day, plus get cost-effective solutions to real-life IT problems.
- Learn more >>
- Save time with automated shipping solutions
-
The Business Essentials Guide provides you useful tools and templates to help grow your business and save you time with automated shipping solutions.
- Visit the UPS Business Essentials Guide
- Microsoft Dynamics CRM Online - Free Six-Month Trial for Eligible Organizations
-
Microsoft Dynamics CRM Online provides fast online access, simple contact management and better sales performance for a low monthly cost - the best value on the market today.
- Learn more about the free, six-month trial offer>>
Meet Doc
-
-
Here to help you with your Document Management Needs
- Check out Doc’s Blog on ZDNet
- Help your company, help the earth I want to share with you the Environmental Defense Fund Paper Calculator, which allows you to gauge your organization's environmental impact.
- Which is Greener: Paper or Digital? The Answer May Surprise You Anything we can do to reduce paper consumption is good. But what about the impact of digital waste?
-
Produced by
ZDNet and -
