Notational Systems

Notational Systems: represent data in different formats

• Binary: the language of computers

  • Base 2 system represented by a string of 1 (on) and 0’s (off)

• Decimal Notation: Human math

  • Base 10 system

• Hexadecimal: Base 16 system represented by a string of numbers (0-9) and characters (A-F)

  • A- 10

  • B- 11

  • C- 12

  • D- 13

  • E-14

  • F-15

  • Used in HTML (website) color wheel

  • IPv6 (Internet Protocol Version 6)

  • Mac Addresses

Data Representation

• The American Standard Code for Information Interchange (ASCII)

  • North American

  • Utilizes 7 bits to store information

  • Provides representation for 128 characters and symbols

• Unicode

  • A globally inclusive and universal set of data representation

  • Unicode supports 136,755 characters across 139 languages

  • Has several standards

  • ASCII is a subset, or smaller piece, of Unicode

    • Subset: smaller

Binary Conversions

• Starting from the left to right: add the decimal numbers listed in the binary chart until the desired values are reached

• Numbers from the chart that are added together will be identified as the binary digit 1 (on) and values that are not added together will be indentified as binary digit 0 (off)