Presents a history of computer viruses, explains various types of viruses and how they affect software or computer operating systems, and describes examples of specific viruses. Available vaccines are explained, and precautions for protecting programs and disks are given. (nine references) (LRW)

Explains how computer viruses were originally created, how a computer can become infected by a virus, how viruses operate, symptoms that indicate a computer is infected, how to detect and remove viruses, and how to prevent a reinfection. A sidebar lists eight antivirus resources. (four references) (LRW)

This guide is designed for federal executives and managers who have a responsibility for the planning and management of software projects and for federal staff members who are affected by, or involved in, making software changes, and who need to be aware of steps that can reduce both the difficulty and cost of software maintenance. Organized in a…

A tutorial introduction to data models in general is provided, with particular emphasis on the relational and network models defined by the two proposed ANSI (American National Standards Institute) database language standards. Examples based on the network and relational models include specific syntax and semantics, while examples from the other…

Described is the Alfa Project in Uruguay, designed to integrate computer education into secondary schools through teacher-training. Both teacher-users and teacher-authors were considered. Course objectives, curriculum content, and teaching guidelines are presented. (MNS)

Based mainly on interviews conducted at 14 federal agencies that had completed or were involved in software conversion projects, this publication provides guidelines for the entire process of software conversion. This is defined as the transformation, without functional change, of computer programs or data elements to permit their use on a…