Presentation is loading. Please wait.

Presentation is loading. Please wait.

Vocabulary Electronic pulses Transistors Decimal numbers

Similar presentations

Presentation on theme: "Vocabulary Electronic pulses Transistors Decimal numbers"— Presentation transcript:

1 Vocabulary Electronic pulses Transistors Decimal numbers
Binary numbers ASCII text code Unicode Bit Byte Kilobyte (KB) Megabyte (MB) Gigabyte (GB) Terabyte (TB)

2 Current Electricity: Regular current electricity:
A continuous unbroken flow of electricity: “hummm…” Electric appliances use current electricity –including computers. But computers turn current electricity into electronic pulses.

3 Electronic Pulses: Electronic pulses:
Separate pulses of electric charge: “Beep beep beep …” Each pulse represents one bit: a 0 or a 1. Eight pulses traveling through the transistors of a computer = 1 byte = 1 letter or other piece of data.

4 Transistors Microscopic electronic “on/off” switches, that make up the circuits inside a computer’s CPU, RAM, other hardware. When an electronic pulse passes through a transistor, it is set to “on” (1) or “off” (0). 8 switches = 8 bits = 1 byte. This is how computers code information.

5 Bits We use the decimal number system, with 10 digits: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9. Computers use the binary number system, with just 2 digits: 0 and 1. A bit is a single binary digit (0 or 1).

6 Bytes A set of 8 bits grouped together = 1 byte.
Each byte codes for 1 letter, or number, or other character, or 1 sound or color. Example: = C = A = T 28 = 256 possible combinations of 0, 1

7 Multiples of Bytes Because each byte codes for just 1 letter (or number…), even a small document can be many thousands of bytes in file size. A digital photograph is millions of bytes large. Therefore, it is helpful to have units of large numbers of bytes: Kilobyte (KB), megabyte (MB), gigabyte (GB), and terabyte (TB).

8 Multiples of Bytes Abbrev. Name Approx. # of bytes KB Kilobyte
1,000 (thousand) MB Megabyte 1,000,000 (million) GB Gigabyte 1,000,000,000 (billion) TB Terabyte 1,000,000,000,000 (trillion)

9 Text Codes Computers use specific codes for what information each byte represents. ASCII (pronounced “as-key”) = The standard code of 8-bit bytes (as in the C A T example). Unicode = a worldwide code, used on the Internet and elsewhere. By using 2 bytes (16 bits), Unicode has over 65,500 different characters and symbols!

Download ppt "Vocabulary Electronic pulses Transistors Decimal numbers"

Similar presentations

Ads by Google