1 Computers (Chp 8) Computers are everywhere. We tend to think of computers as our PC’s and laptops but nearly all our basic appliances etc. are controlled by computers. Computers have changed the way we live and have had a major effect on almost every part of our lives. A computer cannot think for itself – it must be programmed by humans. – Humans give computers a set of instructions and this is a programme which the computer then stores and runs. Hardware The physical objects related to the computer. Inputs & Outputs Some devices are both inputs and outputs: • Touch screen monitors • Modems • Fax Control (more on p.89-92) Computers are used to control many things we take for granted. Examples: Robots – Car factories, factories, games Railway tracks – Switching systems etc. Sewing machines – Controls electric motor, speed, type of stitch etc. Dishwasher/washing machines – controls heat, time, type of wash etc. These can all be pre-programmed which saves a lot of time, money and is a lot less likely to make mistakes. Inputs Devices that input information in to the computer. (from user to computer) Examples: • Keyboard • Mouse • Touchpad • Scanner • Bar code reader • Microphone • Webcam Outputs Information that comes from the computer, out to the user. Examples: • Printer • Speakers • Monitor (screen) • Projector • CNC router
4
Embed
Computers - technologyscr.weebly.comtechnologyscr.weebly.com/uploads/1/5/7/3/15736832/computers_re… · Computers (Chp 8) Computers are everywhere. We tend to think of computers
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
1
Computers (Chp 8)
Computers are everywhere. We tend to think of computers as our PC’s and laptops but nearly all our basicappliances etc. are controlled by computers.Computers have changed the way we live and have had a major effect on almost every part of our lives.
A computer cannot think for itself – it must be programmed by humans. – Humans give computers a set ofinstructions and this is a programme which the computer then stores and runs.
HardwareThe physical objects related to the computer.
Inputs & Outputs
Some devices are both inputs and outputs:• Touch screen monitors• Modems• Fax
Control (more on p.89-92)
Computers are used to control many things we take for granted.Examples:Robots – Car factories, factories, gamesRailway tracks – Switching systems etc.Sewing machines – Controls electric motor, speed, type of stitch etc.Dishwasher/washing machines – controls heat, time, type of wash etc.
These can all be pre-programmed which saves a lot of time, money and is a lot less likely to make mistakes.
Inputs
Devices that input information in tothe computer. (from user tocomputer)
Examples:• Keyboard• Mouse• Touchpad• Scanner• Bar code reader• Microphone• Webcam
Outputs
Information that comes from thecomputer, out to the user.