The following chronology is based on information provided by university officials and Pennsylvania prosecutors and on reporting by The Washington Post. June 11, 1923: Born Paul Arthur Cohen, son of Hyman and Bella Deutsch Cohen, in New York City. 1940: Graduates from Abraham Lincoln High School, Brooklyn, N.Y. 1941: Changes his name to Paul Arthur Crafton. May 1944: Graduates from City College of New York with a degree in mechanical engineering. May 1944: Begins work at Naval Research Lab in Southwest Washington as mechanical engineer. 1950: Receives a master of science degree from the University of Maryland. Dec. 12, 1953: Marries Sonia Marie in White Plains, N.Y. They later have two children, Eric and Laura Melanie. June 1956: Receives a PhD in mechanical engineering from the University of Maryland. Joins engineering faculty of George Washington University in September. 1960: Earns full professor status at GW. 1961: Publishes college textbook, "Shock and Vibration in Linear Systems." 1962: Buys new brick rambler in Regency Estates subdivision of Potomac. 1963: Receives promotion to research physical scientist at Naval Research Lab. January 1969: Resigns post at Naval Research Lab to join Naval Air Systems Command as part-time consultant. February 1970: Resigns from Naval Air Systems Command. Fall 1971: Appointed chairman of GW's engineering administration department. Fall 1975: Voted out as chairman by his five department colleagues. Oct. 12, 1976: Receives patent for a credit card verification system, one of seven patents he holds. March 1, 1977: Officially censured by his department colleages. January 1979: As Jonathan D. North, joins Anne Arundel Public School system as a senior accountant. He is fired two weeks later after references did not check out. August 1979-March 1982: Using the name David Arthur Gordon, holds part-time job as business administration professor at Towson State University in Towson, Md. February-May 1981: Teaches computer courses at University of Delaware under name of Jonathan D. North. December 1981-June 1982: Applies for teaching jobs at 23 colleges in five states and Canada under four aliases. Spring 1982: Joins Rutgers, the state university of New Jersey, to teach finance and international business as Peter H. Pearse, but is fired three weeks later after failing to appear for classes. Spring 1982: Registers as a student in freshman composition course at the University of the District of Columbia under the name of Anthony S. Williams. Spring-Summer 1982: Teaches mathematics and computers at Wagner College, Staten Island, N.Y. as John Byron Hext. June 4, 1982-March 21, 1983: Teaches at Millersville State College near Lancaster, Pa., as an associate professor of business administration using the Pearse name. Fall 1982-February 17, 1983: Teaches computer programing at Shippensburg State College in Shippensburg, Pa. as John Byron Hext. March 21, 1983: Arrested by Pennsylvania authorities as he walks to class at Millersville State College, and charged with forgery, theft by deception, tampering with public documents and false swearing