ict2621_SummaryExam Prep.

CHAPTER 01: INTRODUCTION IT: Combination of hardware, software and services that people use to manage, communicate and share information. SYSTEMS ANALYSIS AND DESIGN: Step-by-step process for developing high-quality IT systems. INFORMATION SYSTEM: Combines technology, people and data to provide support for business functions. SYSTEMS ANALYST: Valued member of IT department who helps plan, develop and maintain information systems. SYSTEM: Set of related components that produces specific results. MISSON-CRITICAL SYSTEM: A system that is vital to a company’s operations. DATA: Basic facts that are the system’s raw material. INFORMATION: Data that has been transformed into output that is valuable to users. ---INFORMATION SYSTEM COMPONENTS--- 1. Hardware HARDWARE: Everything in the physical layer of the IT system. SERVER FARM: Large concentration of servers working together. MOORE’s LAW: Number of transistors on an integrated chip will double about every 24 months. 2. Software SOFTWARE: Programs that control the hardware and produce desired information or results. SYSTEM SOFTWARE: Manages hardware components. APPLICATION SOFTWARE: Programs that support day-to-day business functions and provide users with the information that they need. ENTERPRISE APPLICATIONS: Company-wide applications. HORIZONTAL SYSTEM: Can be adapted for use in many different companies. VERTICAL SYSTEM: Designed to meet the unique requirements of a specific business of industry. LEGACY SYSTEMS: Older systems.