Alan Freedman -- The Computer Language Company - Computer Desktop Encyclopedia
Computer Desktop Encyclopedia
Longest-Running Tech Reference on the Planet

A CDE Definition

You'll love The Computer Desktop Encyclopedia (CDE) for Tech Term of the Day (TTOD)



(1) A framework for writing Web-based applications in Java from the Apache Jakarta Project. See Jakarta.

(2) A holographic optical disc from InPhase Technologies, Longmont, CO, designed for archiving data and video. InPhase was a spin-off of Lucent Technologies in 2000, and Tapestry was the first commercial holographic storage. In 2010, production began for a 300GB write-once, removable optical cartridge. However, InPhase went bankrupt in 2011, and Akonia Holographics acquired its assets in 2012 (

A Disc That Didn't Spin Continuously
Containing a photo polymer recording layer in the middle, the single platter was divided into thousands of optical "books" roughly one cubic millimeter in size. For reading and writing, the disc was rotated to the appropriate book, which held 330 1.4Mbit "binary holograms" (patterns of digital bits). Each hologram was recorded with one flash of a blue laser, and the amazing thing is that every hologram fully occupied the same physical space in the book. For more details, see holographic storage.

Tapestry Drive and Media
In 2010, these 300GB write-once drives were the first commercial holographic storage product. Tapestry's roadmap called for 1.6TB drives, as well as rewritable discs. (Images courtesy of InPhase Technologies.)

Personal Use Only

Before/After Your Search Term
tape dumpTAPI
tape headtapping
tape libraryTaptic Engine
tape marktar
tape outtarball
tape transportTARGA
tapedtarget computer
taped outtarget device
tapeless camcordertarget directory
tapeless storagetarget disk

Terms By Topic
Click any of the following categories for a list of fundamental terms.
Computer Words You Gotta KnowSystem design
Job categoriesUnix/Linux
Interesting stuffPersonal computers
InternetIndustrial Automation/Process Control
Communications & networkingAssociations/Standards organizations
HistoryDesktop publishing
ProgrammingHealthcare IT
System design