Lesson 1 Computer Technology

Changes in Computers over the Past 50 years Computers are SMALLER From room size to pocket size Computers are FASTER Billions of cycles per second Computers are LESS EXPENSIVE Price goes down as technology becomes more available

Trends for the Future Computers will continue to get smaller and faster. Even more people will have access to computers. Voice recognition will get better and be used more widely. Security for computers will be an increasing problem. The internet will grow even larger.

What trends do you see for the future? Computer technology trends video

Speed Measured in Hertz Megahertz (MHz) millions of cycles per second Gigahertz (GHz) billions of cycles per second Hertz: video

Size Measuring Storage and Memory Bytes Kilobyte* One Thousand Bytes Megabyte* One Million Bytes Gigabyte* One Billion Bytes Terabyte* One Trillion Bytes *approximately Size: video

Internal Storage / Memory RAM Random Access Memory Internal Temporary Storage for Current Application in use ROM Read Only Memory Cannot be altered External storage CD & DVD software RAM: video

Computers for: Home and Personal Use Business and Government Use Palm Laptop Desktop Mini Mainframe Super computer

Palm Also called: Handheld PDA Cost: $100 - $500

Laptop or Notebook Portable Cost $1,000 - $3,000

Desktop Also Called Micro Computer PC Cost: $500 - $1,500

Mini Computer Sometimes used as a server for a small – medium sized network. Cost: $10,000 and up

Mainframe Used as a server for medium to large businesses or organizations. Cost: $100,000 and up

Super Computer Largest, most powerful computers used today NASA Large Universities Government Cost: $ Millions