Information provides knowledge about something or someone
Information technology (IT) refers to the entire spectrum of technologies for information
processing.
An Information System (IS) is typically considered to be a set of interrelated elements or
components that can collect (input), manipulate (processes), and disseminate (output) data and
information and provide a feedback mechanism to meet an objective.
In today’s world, information systems are indispensable to businesses, industries, and
organizations, to meet the future challenges. Organizations need ISs to meet the information
needs of its employees. More and more business organizations are using information systems to
improve the way they conduct business.
A computer is an electronic device that stores, retrieves, and processes data, and can be
programmed with instructions. It is composed of hardware and software components, and can
exist in a variety of sizes and configurations.
Hardware consists of computer equipment used to perform input, processing, storage, and output
activities.
A single integrated circuit has many transistors, registers, and capacitors grown on a single chip
of silicon.
Moore's Law states that the number of transistors on a microchip doubles about every two years,
though the cost of computers is halved. (In 1965, Gordon E. Moore, the co-founder of Intel, made
this observation that became known as Moore's Law.)