The online version of Merriam Webster Collegiate Dictionary and Collegiate Thesaurus.
A collection of 100 subject dictionaries and reference resources covering science, technology, humanities, business, and social sciences.
This site offers a search interface for over 900 general and specialized subject dictionaries.
An online dictionary and search engine for computer and Internet technology.
Scientific and Technical Acronyms, Symbols and Abbreviations
A database from Wiley Interscience that can be searched and browsed.
An index of links to glossaries or dictionaries from scientific disciplines including chemistry, computer and information sciences, and mathematics.
This site offers definitions of computer terms and concepts.
From the Industrial Technology Institute.
A dictionary of electronics-related terms from Twisted Pair Software.
Dictionary of Algorithms and Data Structures
A dictionary of algorithms, algorithmic techniques, data structures, archetypical problems, and related definitions.
ANS T1.523-2001, American National Standard.
Terms and concepts in the area of semiconductor materials, manufacturing and devices.
Definitions for basic data communications and networking technologies.
"English, Medical, Legal, and Computer Dictionaries, Thesaurus, Encyclopedia, a Literature Reference Library, and a Search Engine all in one."
How Many? A Dictionary of Units of Measurement
Site maintained by the Director of the Center for Mathematics and Science Education at the University of North Carolina, Chapel Hill.
This site provides access to over 1500 dictionaries in more than 230 languages. Specialty dictionaries are included covering electronics, architecture, art, chemistry, computing, economics, multimedia, physics, sociology, science, and telecommunications.