Describe about the Layered computer design

Introduction

Layered computer design focuses on computer design. It uses top-down, layered approach to design and also to improve computers. A computer is designed layer by layer, starting with top conceptual layer and ending with bottom layer, complete design. A layer is implemented by the layer below. There are numerous possibilities to implement a layer. To decide, design goals are used: speed, size, cost, weight, reliability, power consumption, flexibility, expendability and compatibility. Layered computer design concentrates on the speed (performance) goal and describes how it can be used to make decisions on design of a computer named EMY. It would be determined often that the best (most reliable) computer speed measure is the run (execution) time.