Consult dictionaries for definitions of engineering terms. Encyclopedias provide background information, and some may include bibliographies of recommended readings.
REFERENCE TK151 .D56
Dictionary of electrical abbreviations, signs, and symbols. Edited by David D. Polon. New York, : Odyssey Press, 1965.
Abbreviations and graphic symbols used in electrical engineering.
REFERENCE TK9 .I478 1988
IEEE standard dictionary of electrical and electronics terms. Edited by Frank Jay. 4th ed. New York, NY: Institute of Electrical and Electronics Engineers, 1988.
Defibitions of terms which appear in standards published by IEE, IEEE, ANSI or ASTM.
REFERENCE TK7804 .E47 1990
Encyclopedia of electronics. Edited by Stan Gibilisco and Neil Sclater. 2nd ed. Blue Ridge Summit, PA: Tab Professional and Reference Books, 1990.
Fills the gap between brief-entry dictionaries and standard handbooks by providing slightly longer more detailed definitions of terms, many illustrated with drawings or diagrams.
REFERENCE TK7804 .H54 2006
High definition : an A to Z guide to personal technology. Boston: Houghton Mifflin, 2006.
Basic and not-so-basic terminology of personal technology devices such as cell phones, computers, CD and DVD players, monitors and TVs.
REFERENCE TK7804 .D68 1981
Douglas-Young, John. Illustrated encyclopedic dictionary of electronics. West Nyack, N.Y.: Parker Pub. Co., 1981.
Intended for technicians, engineers and others working with electronics. Material is presented in non-mathematical language, but tables, calculations and data required by the technologist are included.
Gibilisco, Stan. The illustrated dictionary of electronics. 8th. McGraw-Hill, 2001. Available: GALILEO netLibrary Electronic Book. 
Updated edition of Turner & Gibilisco's Illustrated Dictionary of Electronics.
REFERENCE TK7804 .M354 1994
Markus, John and Neil Sclater. McGraw-Hill electronics dictionary. 5th , international ed. New York: McGraw-Hill, 1994.
Definitions of terms, abbreviations and acronyms used in electronics.
REFERENCE TK7804 .T87 1991
Turner, Rufus P. The illustrated dictionary of electronics. 5th ed. Blue Ridge Summit, PA: Tab Professional and Reference Books, 1991.
Definitions of terms, abbreviations and acronmyms, with illustrations, schematics and diagrams.