1. IT Essentials Chapter 1 Part C

2. 1.5 Math for a Digital Age

3. .5.1Measurement-related terminology Bit – The smallest unit of data in a computer. A bit can take the value of either one or zero Byte – A byte is a unit of measure used to describe the size of a data file, the amount of space on a disk or other storage medium. One byte consists of eight bits of data. Nibble – A nibble is half a byte or four bits Kilobyte (KB) – A kilobyte is approximately 1,000) bytes Megabyte (MB) – A megabyte is approximately 1,000,000 bytes)

4. Speed-related Terms Hertz (Hz) – Is a unit of measurement of frequency. It used to describe the speed of a computer's microprocessor. Megahertz (MHz) – One million cycles per second. This is a common measurement of the speed of a processing chip. Gigahertz (GHz) – One billion (1,000,000,000) cycles per second. Note: PC processors are getting faster all the time

5. 1.5.3Boolean logic gates: AND, OR, NOT Computers are built from various types of electronic circuits These circuits depend on what are called AND, OR, and NOT gates These gates are characterized by how they respond to input signals There are only three primary logic functions: AND, OR, and NOT OR gate acts as follows: if either input is on, the output is on. The AND gate acts as follows: if either input is off, the output is off. A NOT gate acts as follows: if the input is on, the output is off, and vice versa.