Prof. Anatoly Sachenko
I. LECTURE OVERVIEW
Foundation Concepts: Computer Hardware, reviews trends and developments in microcomputer, midrange, and mainframe computer systems; basic computer system concepts; and the major types of technologies used in peripheral devices for computer input, output, and storage.
Computer Systems – Major types of computer systems are summarized in Figure 13.2. A computer is a system of information processing components that perform input, processing, output, storage, and control functions. Its hardware components include input and output devices, a central processing unit (CPU), and primary and secondary storage devices. The major functions and hardware in a computer system are summarized in Figure 13.9
Microcomputer Systems – Microcomputers are used as personal computers, network computers, personal digital assistants, technical workstations, and information appliances. Like most computer systems today, microcomputers are interconnected in a variety of telecommunications networks. This typically includes local area networks, client/server networks, intranets and extranets, and the Internet. Other Computer Systems – Midrange computers are increasingly used as powerful network servers, and for many multiuser business data processing and scientific applications. Mainframe computers are larger and more powerful than most midsize computers. They are usually faster, have more memory capacity, and can support more network users and peripheral devices. They are designed to handle the information processing needs of large organizations with high volumes of transaction processing, or with complex computational problems. Supercomputers are a special category of extremely powerful mainframe computer systems designed for massive computational assignments.
II. LEARNING OBJECTIVES
• Identify the major types, trends, and uses of microcomputer, midrange and mainframe computer systems. • Outline the major technologies and uses of computer peripherals for input, output, and storage. • Identify and give examples of the components and functions of a computer system. • Identify the computer systems and peripherals you would acquire or recommend for a business of your choice, and explain the reasons for your selections.
III. LECTURE NOTES
Section 1: Computer Systems: End User and Enterprise Computing INTRODUCTION
All computers are systems of input, processing, output, storage, and control components. Technology is evolving at a rapid pace, and new forms of input, output, processing, and storage devices continue to enter the market. Analyzing City of Richmond and Tim Beaty Builders
We can learn a lot about innovative business uses of PDAs from this case. Take a few minutes to read it, and we will discuss it (See City of Richmond and Tim Beaty Builders in Section IX).
Prof. Anatoly Sachenko
TYPES OF COMPUTER SYSTEMS -[Figure 13.2]
There are several major categories of computer systems with a variety of characteristics and capabilities. Thus, computer systems are typically classified as:
• Mainframe computers
• Midrange computers
These categories are attempts to describe the relative computing power provided by different computing platforms or types of computers therefore, they are not precise classifications. Some experts predict the merging or disappearance of several computer categories. They feel that many midrange and mainframe systems have been made obsolete by the power and versatility of client/server networks of microcomputers and servers. Most recently, some industry experts have predicted that the emergence of network computers and information appliances for applications on the Internet and corporate intranets will replace many personal computers, especially in large organisations and in the home computer market. MICROCOMPUTER SYSTEMS
Microcomputers are the smallest but most important categories of computers systems...
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