Main Functions of a Computer
There are four main functions of a computer that make user interaction possible:
- Input is data we give to our computers through interactions - Processing is comprised of the translation of input and the instructions given for output - Memory is used to store either temporary or permanent information - Output is the information that gets returned by the computer
Computer instructions are written in binary, also known as machine code. Computer hardware operates on a series of these binary instructions through pulsating power signals that signify either
ON based on the binary digits
Binary Numbering System
The binary numbering system is built on a base of
2. Every time we reach a power of
2, we add another digit. The decimal system works the same way, just with
Counting to 10 in binary: Decimal Binary 0 0 1 1 2 10 3 11 4 100 5 101 6 110 7 111 8 1000 9 1001 10 1010
Least and Most Significant Bits (LSBs and MSBs)
The Least Significant Bit (LSB) is the farthest right digit in a binary number while the Most Significant Bit (MSB) is the leftmost digit.
0 is an acceptable value for both the MSB and the LSB.
8675309 expressed in Binary: 100001000101111111101101 ^ ^ MSB LSB
Binary data is any set of expressions that result in a response set of only two answers.
Binary Data Examples: - TRUE or FALSE - ON or OFF - 0 or 1 - LEFT or RIGHT Non-Binary Data Examples: - TRUE/FALSE/MAYBE - LEFT/RIGHT/CENTER - Ages of coworkers