Introduction, Web Browsers
Tom Kelliher, CS14F
Sept. 3, 1996
- ``Only five computers needed in the entire world.''
- ``A computer for each person? Surely, you're joking!''
- ``Wait, I have to download some files from my workstation to my
Can society keep pace?
What are some real-life examples of computer-like devices?
What is it? Who has it?
Which are necessary, sufficient:
- Using productivity software.
- Using the Internet.
- Confidently purchasing a PC.
- Diagnosing error messages.
- Having an awareness of computerization consequences.
``I don't have to be an auto mechanic to drive a car.''
What ``fears'' do you have? Why?
A digital, electronic, programmable device, composed of hardware and
software. It performs a variety of tasks, processing data and outputting
- Accurate (GIGO).
- Massive storage capacity.
Hardware is the physical machine:
- Input devices.
- Output devices.
- Secondary storage devices.
Software --- the ``mind'' of a computer.
- Information processing.
- Word processing.
- Desktop publishing.
- Spreadsheets, personal finance.
- Communication software.
- Presentation graphics.
- Reference programs.
What are they?
- Power consumption.
- Blind faith in results.
- Loss of jobs.
- Input --- Gathering data and bringing it to the computer.
- Processing --- Manipulating data: calculating, comparing, searching,
- Output --- Sending information from computer to outside world.
- Storage --- Stores information for later use; retrieves ``old''
Real life examples.
- Hardware --- Something you can touch.
- Memory: RAM (memory) vs. disk (storage). A computer's
- Digital processing: binary, bits, bytes (characters).
- Kilobyte, megabyte, gigabyte, terabyte.
- Software --- Pattern of bits stored somewhere --- no inherent
- Programming languages: HLL, assembly, machine. Examples.
- System and Application software.
- Data --- Examples. Useful data (as opposed to garbage):
- People --- hackers, gurus, power users, newbies.
- Procedures --- How a person ``relates'' (uses) to the computer.
What are the consequences?
- The first generation (1951--1959)
- Vacuum tubes.
- Machine language.
- Punched cards, magnetic tape.
- The second generation (1959--1963)
- Core memory.
- Magnetic disks, tape.
- The third generation (1963--1975)
- Integrated circuits.
- Solid-state memory.
- The fourth generation (1975--present)
- The microprocessor. Intel. VLSI.
- Bill Gates gets into the OS business.
- The IBM PC.
More history information.
- Powering the system on.
- Logging in (later).
- Navigating the desktop.
- Finding and starting Netscape.
- Navigating in Netscape: URLs, printing, etc.
- Logging out (later).
- Shutting down ( Don't just turn the computer off.)
Thomas P. Kelliher
Mon Sep 2 20:45:05 EDT 1996