A crawler is a program that visits Web sites and reads their pages and other information in order to create entries for a search engine index.
Object-oriented programming (OOP) is a programming language model organized around "objects" rather than "actions" and data rather than logic. (Continued...)
Service-level management is the monitoring and management of the quality of service(QoS) of an entity's key performance indicators(KPIs).
Software is a general term for the various kinds of programs used to operate computers and related devices.