000 00615nam a2200181 a 4500
005 20231107123410.0
008 090331s19uu xx 00 eng d
040 _6HSLRC
_aHSLRC
_cHSLRC
245 1 0 _aComputer security
260 0 _aAlexandria, VA,
_cc1986.
300 _a128 pages. : colored. illustrations.
440 0 _aUnderstanding computers
_942800
500 _aIncludes glossary, appendix, bibliography, and index.
650 _aComputers
_xAccess control
_942801
700 _aTime-Life Books.
_942802
942 _2lcc
_cBK
999 _c55607
_d55607