Hardware vs. Software Hardware is the physical equipment directly involved in the performance of data-processing or communications functions. Software is the programs, routines, and symbolic languages that control the functioning of the hardware and direct its operation. Definition of a computer A computer is a programmable machine that stores, retrieves, and processes information A Personal…
When installing or removing computer hardware and other peripherals : 1. Wear proper apparel. Avoid acrylic or wool sweaters when working with electronic parts. Do not wear loose-fitting clothing, rings, bracelets etc. 2. Unplug all computer equipment and peripherals before opening any cases. (The only exception to this is if you were working without an…
First Generation Computers 1951 – 1959 • Vacuum tube logic. • Magnetic drum or tape storage. • Punched cards used for data inputs. • Programmed in machine language. • Large, slow and expensive. Second Generation Computers 1959 – 1963 • Discrete transistors replace vacuum tubes. • Magnetic core used for main memory. • Magnetic disk…
Understanding Electricity Everything inside or attached to the PC system unit runs on electricity. Electricity is both the lifeblood and the mysterious evil of the personal computer. It’s a flowing entity, measured in amps, ohms, and volts that should be approached with respect, if not outright fear. Electricity flowing through a circuit is very much…