Information technology

People use tools to share facts.

We use computers to make and save info. We also use phones and TVs to send it.

Long ago, people used sticks to count. Later, they made machines with gears. These early tools helped people do math.

Old computers were very big. They used paper with holes in it.

These holes helped the machines read data.

Now, we use tiny parts to work. This helps computers use less power. They can also work much faster.

Today, we use the internet to talk. We can send notes in a flash. Technology helps us every day.

Information technology, or IT, is the study of computers and tools. We use these tools to make, store, and send information.

IT includes things like telephones and televisions too.

People have used tools to share facts for a long time. Long ago, people used tally sticks to count. Later, they made machines with gears. One very old machine is the Antikythera mechanism. It is an early mechanical computer from the first century BC.

Early computers were very large. They used parts like valves to work.

Some used punched tape to store data. This was a long strip of paper with holes in it.

Later, scientists made transistors. These are tiny parts that use much less power. This helped make the personal computers we use today.

Now, we use the internet to talk. We can send an email to someone far away.

Technology helps us finish many tasks in just a few seconds.

Information technology, or IT, is the study of computers and other tools. These tools help us create, process, store, and send information.

IT includes computer networks and devices like telephones or televisions. It is a way to use computer science and engineering in real life. IT systems help many different industries manage data and talk to each other. These systems are vital for keeping communication networks running smoothly.

How IT works involves several important steps. First, a system takes in data to process it. This might mean using math to help people make decisions. Then, the system stores that information so it can be used later.

Finally, the system transmits the information to other people or places. This can happen through telephone lines or cable networks. For example, email lets companies talk to suppliers across the world. This way of working makes many hard jobs much faster.

Humans have shared information since the first writing systems were made. Long ago, people likely used tally sticks to help with counting. The Antikythera mechanism is a very old geared machine from the first century BC. It is considered the first mechanical analog computer. In 1958, the term "information technology" first appeared in an article. Authors Harold J. Leavitt and Thomas L. Whisler gave it that name. They wanted a way to describe these new, growing technologies.

Many pioneers helped build the machines we use today. Alan Turing, J. Presper Eckert, and John Mauchly worked on early computers.

The Zuse Z3 was the first programmable computer, completed in 1941. Later, the Manchester Baby ran its first program on 21 June 1948.

In 1956, IBM introduced the first hard disk drive. By 1971, a team at Intel invented the microprocessor. These many inventions led to the personal computers of the 1970s.

Today, IT is part of almost everything we do. We use it to shop online and use many internet services.

In 2002, digital storage became larger than analog storage for the first time. Most data in the world is now held in digital forms. This includes things like hard disks and optical devices. We rely on these tools to communicate and work every single day. The world of technology continues to grow and change quickly.

Information technology, often called IT, is the study and use of computers and telecommunication systems. It involves using various devices to create, process, store, retrieve, and transmit information.

While many people associate IT only with computers, it also includes technologies like telephones and television. IT is a practical application of computer science and computer engineering. An IT system is a specific collection of hardware, software, and peripheral equipment. These systems are operated by limited groups of users to support organizational processes.

Successful IT projects require careful planning and constant maintenance to work correctly.

To understand how IT works, we must look at how it handles data. The process begins with processing, which can involve using mathematical methods to help with decision-making. Next, the system must store this information for future use.

Finally, the system transmits or sends the data to other locations. This transmission often happens through cable networks or telephone lines. For example, email allows a company to communicate with a supplier in a different part of the world. This ability to move data quickly has revolutionized how the global workforce operates.

Historians distinguish between four distinct phases of IT development based on how data is stored and processed. The first is the pre-mechanical phase, which lasted from 3000 BC to 1450 AD. The second is the mechanical phase from 1450 to 1840. The third is the electromechanical phase from 1840 to 1940. The final phase is the electronic phase, which began in 1940 and continues today. In the earliest days, humans used simple tools like tally sticks for computation. The Antikythera mechanism, dating to the first century BC, is an important example. It is considered the first known mechanical analog computer and the earliest known geared mechanism.

Modern computing history was shaped by many important pioneers. During the mid-1900s, Alan Turing, J. Presper Eckert, and John Mauchly led early efforts. Turing even began to ask questions about artificial intelligence. In 1941, the electromechanical Zuse Z3 was completed, becoming the world's first programmable computer.

During the Second World War, the Colossus was developed to decrypt German messages. It was an electronic digital computer, but it was not general-purpose. It could not store programs in memory; instead, users changed internal wiring with plugs and switches. The first modern electronic digital stored-program computer was the Manchester Baby, which ran its first program on 21 June 1948.

Technological breakthroughs in the mid-20th century changed everything. In the late 1940s, Bell Laboratories developed transistors. This allowed computers to use much less power. For comparison, the Ferranti Mark I used 4050 valves and consumed 25 kilowatts of power.

However, a transistorized computer from the University of Manchester used only 150 watts by November 1953. Other major inventions included the integrated circuit, created in 1959 by Jack Kilby and Robert Noyce. In 1971, the microprocessor was invented by Ted Hoff, Federico Faggin, Masatoshi Shima, and Stanley Mazor at Intel. These steps led to the personal computer in the 1970s.

Data storage has also seen massive changes over time. Early computers like Colossus used punched tape, which is a strip of paper with holes.

Digital storage began during World War II with delay-line memory. The first non-volatile storage, meaning it keeps data without power, was the magnetic drum invented in 1932. IBM introduced the first hard disk drive in 1956. By 2002, digital storage capacity finally exceeded analog storage capacity. By that year, 94% of the world's data was held digitally. This included 52% on hard disks, 28% on optical devices, and 11% on digital magnetic tape.

Today, IT connects to almost every part of modern life. It has changed how we shop, with e-commerce sales reaching $289 billion by 2012. It also manages huge amounts of data through Database Management Systems (DMS). These systems were created in the 1960s to store and retrieve data accurately. In the 1970s, Ted Codd proposed the relational storage model, which uses tables, rows, and columns. This led to the first commercial relational database from Oracle in 1981. As computers become more sophisticated, our reliance on these digital systems continues to grow.