Numbers

10 BASE-2
An Ethernet network that uses BNC (also known as RG-58) cabling attached to a chain of T-connectors with a 50ohm terminator at each end of the chain. The main advantage of this type of network is the ability to have each computer up to 185 meters apart.

10 BASE-T
An Ethernet network that uses a twisted pair (also known as RJ-45) cabling between a network interface card and a hub to tie the network together. The main advantage of this type of network is its ease of installation and expandability. Runs at 10 Mbps.

100 BASE-TX
An Ethernet network that uses a twisted pair (also known as RJ-45) cabling between a network interface card and a hub to tie the network together. The main advantage of this type of network is its ease of installation and expandability. Runs at 100 Mbps.

16-bit machine
A computer that works with information in groups of 16 bits (binary digits) at a time. A description of a computer as a 16-bit machine can either refer to the word size (basic wording unit) of its microprocessor or, more commonly, refer to the number of bits transferred along the computer's data bus (data path along which information travels to and from the microprocessor) at a single time.

32-bit machine
A computer that works with information in groups of 32 bits (binary digits) at a time. A description of a computer as a 32-bit machine can either refer to the word size (basic working unit) of its microprocessor or, more commonly, refer to the number of bits transferred along the computer's data bus (data path along which information travels to and from the microprocessor) at a single time.

4GL
Fourth Generation Language. A high-level declarative language specifically for application programming with powerful semantics and syntax allowing programmers to develop systems at great speed.

64-bit machine
A computer that works with information in groups of 64 bits (binary digits) at a time. A description of a computer as a 64-bit machine can either refer to the word size (basic working unit) of its microprocessor or, more commonly, refer to the number of bits transferred along the computer's data bus (data path along which information travels to and from the microprocessor) at a single time.

80286:
First used in the IBM PC/AT, which was announced in 1984, this was a 135,000 transistor processor, capable of delivering up to 1.5 million instructions per second. It became the de facto standard for PC processors at the time.

80386:
First announced in 1986. This was a 275,000 transistor processor, capable of delivering up to 10 million instructions per second. This is regarded as the first of the modern generation of IBM PC processors, being capable of satisfactorily running memory-intensive programs such as Microsoft Windows.

80486:
(i486) First announced in 1989. Today most PCs use the i486 Processor family. There are up to 1.2 million transistors in an i486 and at a clock rate of 66mhz it delivers up to 54 million instructions per second.