computer virus.
Several telephone calls to the family's home in Silver Spring, Md.,
near Washington, went unanswered. Later, an answering machine was
attached and messages left on it were not returned.
The younger Morris also could not be reached. The university said it
did not have a local address for him, and Lynn said college officials
believed he was on his way to Washington.
Computer viruses behave like biological viruses in that they
duplicate themselves and spread from computer to computer, through
''electronic mail'' systems or other networks. They consume computer
processing power and storage space, and some - but apparently not
this one - destroy stored information.
The virus was introduced into Arpanet, a Department of Defense
computer network linking universities, research centers and defense
operations, officials said. It was intended to remain there
undetected, slowly making copies that would move from computer to
computer, the Times said.
But a design error caused it instead to replicate out of control,
the Times reported Friday, quoting an anonymous caller to the
newspaper who said he was an associate of the program's designer.
The virus jammed more than 6,000 computers nationwide starting
Wednesday. But it apparently caused no damage other than lost
research time and the thousands of costly hours that computer
scientists and programmers were spending to remove it from their
systems. By Friday, most universities and research centers had turned
their computers back on.
George Strawn, director of the Computation Center at Iowa State
University in Des Moines, described the impact of the virus at his
school as ''a slight case of the sniffles.''
Doug Van Houweling, vice provost for information technology at the
University of Michigan, said no files were damaged but many hours of
work were needed to clean out ''duplicate waste files'' the virus
created.
Hans-Werner Braun, a computer expert at the Ann Arbor, Mich.,
school, said the main effect of the incident was to call attention to
the system's vulnerability.
The elder Morris told the Times that the virus ''has raised the
public awareness to a considerable degree. It is likely to make
people more careful and more attentive to vulnerabilities in the
future.''
Sources told the Times that his son flew to Washington on Friday and
planned to hire a lawyer and meet with officials in charge of the
Arpanet network to discuss the incident.
Computer scientists said the younger Morris worked in recent summers
at the American Telephone and Telegraph Co.'s Bell Laboratories. One
of his projects included rewriting the communications security
software for most computers that run the Unix operating system, which
AT&T developed, the Times reported.
Computer scientists who are disassembling the virus to learn how it
worked said they have been impressed with its power and cleverness.
The elder Morris, 56, told the Times that it was ''the work of a
bored graduate student.''
Dexter Kozen, the graduate faculty representative in Cornell's
computer science department, said he chuckled when he heard that
quote.
''We try to keep them from getting bored,'' he said. ''I guess we
didn't try hard enough.''
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