lock Last modified: Friday, November 16, 2001
(1) To make a file or other piece of data inaccessible. File locking is a critical component of all multi-user computer systems, including local-area networks. When users share files, the operating system must ensure that two or more users do not attempt to modify the same file simultaneously. It does this by locking the file as soon as the first user opens it. All subsequent users may read the file, but they cannot write to it until the first user is finished. In addition to file locking, many database management systems support record locking, in which a single record, rather than an entire file, is locked. This enables different users to access different records within the same file without interfering with one another. (2) In Macintosh environments, locking a diskette means write-protecting it.
•E-mail this definition to a colleague• Sponsored listings Find Commercial Door Manufacturers - More than 1500 building product catalogs, CAD libraries, PDF catalogs & more at Sweets.com. Compression Latches: Southco - Manufactures access hardware solutions including door panel latches and locks, hinges, handles, quick access fasteners and electronic access products. Laptop Accessories - Sells laptop computer accessories including laptop batteries, chargers, wireless cards, CD/DVD drives, and AC adapters. For internet.com pages about lock . Also check out the following links! Sponsored listings Laptop Accessories at Dell Business - Check out Dell Small Business for Laptop Accessories. Buy Dell Direct. Find Local Door Pros Here! - Find Local Door Pros at Service Magic. Our Service is Quick, Free, & No Obligation Required. Get Contractors to Compete for Your Business! Life Lock Identity Theft Prevention and Credit Protection - Life Lock is America's Best Identity Theft Prevention service hands down. Life Lock is ProActive, not ReActive. Only $99/yr to Protect your Good Name. IronKey Security Flash Drive - Secure Flash Drive w/ Encryption. FIPS 140-2 Level 2 Certified. Identity Theft Protection: As Seen on TV - Identity theft protection service with $1 million guarantee. Save with promo code 4life.	File Management database management system file local-area network multi-user operating system record write-protect Give Us Your Feedback Shopping lock Products Compare Products,Prices and Stores Shop by Category: Building Supplies 38039 Store Offers Sport and Outdoor 6543 Store Offers Baby Care 127 Store Offers Auto Parts and Accessories 28539 Store Offers Security Systems and Surveillance 405 Store Offers