Data Representation

First..

SOURCES of Data :

1.Original
2.Previously stored

Digitizing is taking data and convert it into BINARY form for the computer to understand.

Somethings for storing BINARY data :
-Optical
-Electronic
-Magnetic

Bit is the smallest unit of data that a computer uses.
4 Bits = 1 nibble
8 bits = 1 byte
Information move into computer in bytes or on multiple bytes which we call "words".


IMPORTANT characteristics of storage devices
-Speed Time
-Cost
-Capacity
-Type of Access