A local area network is a computer network that interconnects computers within a limited area such as a residence, school, laboratory, university campus or office building.
Binary number is a number expressed in the base-2 numeral system or binary numeral system, a method of mathematical expression which uses only two symbols: typically "0" and "1".
Computer is an electronic device for storing and processing data, typically in binary form, according to instructions given to it in a variable program.
Internet is a global computer network providing a variety of information and communication facilities, consisting of interconnected networks using standardized communication protocols.
Ecommerce, also known as electronic commerce or internet commerce, refers to the buying and selling of goods or services using the internet, and the transfer of money and data to execute these transactions.
In database design, a composite key is a candidate key that consists of two or more attributes (table columns) that together uniquely identify an entity occurrence (table row).
A compound key is a composite key for which each attribute that makes up the key is a simple (foreign) key in its own right.
A computer is a machine that can be instructed to carry out sequences of arithmetic or logical operations automatically via computer programming. Modern computers have the ability to follow generalized sets of operations, called programs.
