Fourth Generation

Fourth Generation

The duration of 4th generation is from 1971 to 1985. In this era the size and the cost of computer has dramatically dropped, where as the memory and the speed of computers has increaseddrastically. These computers are based on microprocessor. The characteristics are associated with the use of chip technology, low cost memory and wide availability of a relatively small number of operating systems.

CHARACTERISTICS OF FOURTH GENERATION COMPUTERS:

• Used chips for Central Processing Unit (C.P.U.) and memory.
• Development of micro-processor.
• Very compact and smallest in size.
• Excellent speed and reliability.
• Increase in primary storage capacity
• Disks were used as secondary storage device.
• Greater versatility in software.
• Advance input/output devices were used.
• Low Cost.
• Portable computers were introduced.

Fourth generation computer systems

INTRODUCTION

This paper is presented as a discussion of fourth generation computer systems. To predict future developments in the computer industry is to speculate - to theorize on the basis of observable trends and anticipated needs. Numerous questions arise. We do not know the answers to all questions nor do we know how to obtain all the answers. The intent of this paper is to suggest reasonable approaches to developments and tp offer a solution to a fundamental EDP problem. How can computers and applications be integrated within a communication and control system? Computers of prior generations emphasized computation. Fourth generation computers, as envisioned in this paper, will emphasize a communication and control system. The characteristics of fourth generation systems are outlined in the first part of this paper and discussed in detail later. Prior to this discussion, the computer evolution, the software situation, the effects of large scale integration, and fourth generation programmipg systems are considered. While one cannot predict characteristics of fourth generation systems with certainty, one can confidently assume that many changes in computing will occur. This paper contains speculation concerning the possible changes. Opinions and suggestions within the paper represent a consensus among the authors but are not representative of the company by which the authors are employed.