-- card: 4762 from stack: in -- bmap block id: 0 -- flags: 0000 -- background id: 2783 -- name: What is a virus? -- part 1 (button) -- low flags: 00 -- high flags: 0000 -- rect: left=19 top=71 right=153 bottom=233 -- title width / last selected line: 0 -- icon id / first selected line: 0 / 0 -- text alignment: 1 -- font id: 0 -- text size: 12 -- style flags: 0 -- line height: 16 -- part name: ----- HyperTalk script ----- on mouseUp show card field footnote end mouseUp -- part 2 (field) -- low flags: 81 -- high flags: 2004 -- rect: left=18 top=294 right=335 bottom=494 -- title width / last selected line: 0 -- icon id / first selected line: 0 / 0 -- text alignment: 0 -- font id: 3 -- text size: 10 -- style flags: 0 -- line height: 13 -- part name: Footnote ----- HyperTalk script ----- on mouseUp hide card field footnote end mouseUp -- part contents for background part 10 ----- text ----- What is a virus? -- part contents for background part 2 ----- text ----- According to the dictionary: vi´rus, n. [L., poison.] … 2. (a) any of a group of ultramicroscopic or submicroscopic infective agents that cause various diseases, as smallpox: viruses are capable of multiplying in connection with living cells… The important parts of the definition are “infective agents” and “capable of multiplying.” In terms of a computer, a virus is a program, or any executable code, which entered the computer unintentionally (it infects), and spreads itself to other files and computers (it multiplies). -- part contents for background part 11 ----- text ----- In a broader sense but not as correctly, the term “virus” can mean any code which enters a computer without the operator’s knowledge and causes problems on that system. This definition also covers the so called Trojan Horses, Worms, and Time Bombs which enter a system and cause trouble, but may not replicate. -- part contents for card part 2 ----- text ----- New World Dictionaries, “Webster’s New Universal Unabridged Dictionary” (New York: Simon & Schuster, 1979), p. 2042