Information

Information tells us things.

We can see it in patterns. We can hear it in music. It can even be in a picture.

Information helps us learn. It can be sent through space. It can be kept in a box. People use it to talk.

Small bits make up information. We use these bits to build words. Then words make sentences.

One person might see a stone. A scientist might see something else. The stone tells different stories.

Information helps us know the world. It is everywhere around us.

Information is a way to tell us things.

It is not the same as knowledge. Instead, it is the meaning we find in things. We can find information in patterns. We can see it in a picture or hear it in music.

Information works in many steps. Think about a book. First, we see a letter. That letter is part of a word. The word is part of a phrase. The phrase is part of a sentence. Each step gives us more meaning. This is how we turn data into knowledge.

We can also use bits to store information. A bit is a small unit. It helps reduce what we do not know. One coin flip gives us one bit of information.

Different people see different things. A geologist might look at a stone. They see one kind of information. An archaeologist might look at the same stone. They see something else. The stone tells a new story to each person.

Information helps us connect to the whole world.

Information is a special concept that has the power to tell us things.

It is not the same thing as knowledge itself. Instead, information is the meaning we find when we look at something. We can find information in many different patterns. It might be in a song or a bright picture. It can even be in the way a natural process works. Any pattern that is not totally random can carry information.

This helps us understand the world around us.

Information often works in a series of steps. Think about how you read a written book. First, you see a single letter or a symbol. That letter is part of a word. The word is part of a phrase. The phrase is part of a sentence. Each step helps you build more meaning. This process turns raw data into real knowledge. In computers, bits work in a similar way. These tiny bits are turned into letters or numbers. This allows us to process information one level at a time.

People have studied this idea for a very long time. The word comes from Latin words about teaching or creating. In the 14th century, people used it to mean training or instruction. Later, the idea changed as people studied how we sense the world. A major change happened in the 1940s. A scientist named Claude Shannon helped start information theory.

This was the scientific study of how we store and send information. His work helped make things like the Internet possible.

There are many important facts about how we measure information. Scientists use a unit called a bit to measure it. A bit is something that reduces uncertainty by half. For example, flipping one fair coin gives you one bit of information.

Flipping two fair coins gives you two bits. We also use a measure called entropy to see how much uncertainty exists. In 2007, a study found that 97% of stored information was digital. The year 2002 was the start of the digital age for storage.

Information can look different to different people. Imagine a large stone sitting in a field.

A geologist might look at that stone and see one kind of information. An archaeologist might look at the same stone and see something else. The stone tells a new story based on what the person knows. Information can also be sent through space or time. We use tools like telecommunication to move it. We can even hide information using encryption to keep it safe.

Information is an abstract concept that describes anything with the power to inform. It is not the same thing as knowledge itself. Instead, information is the meaning we derive from a representation through interpretation. At a fundamental level, it involves interpreting things we sense or their abstractions. Any natural process that is not completely random conveys information. Any observable pattern in any medium can also carry information.

This makes information a vital part of how we understand the universe.

Information is often processed in an iterative way, meaning it happens in repeating steps. Data at one step is processed into information for the next step. Consider the process of reading written text. Each individual symbol or letter conveys information relevant to its word. Each word then conveys information relevant to the phrase it belongs to. Each phrase provides information for the entire sentence. Finally, this information is interpreted to become knowledge within a specific domain. Digital signals work similarly, where bits are interpreted into symbols or structures.

There are different ways that information is expressed and structured. It can be structured as data, which can sometimes be compressed to an optimal size. This is known as the theoretical limit of compression. Information can be continuous, such as analogue signals, music, or pictures. It can also be discrete, such as digital signals that use specific signs. Information can be transmitted through space via telecommunication or through time via data storage. It can even be encoded into sequences of signs or encrypted for safe communication.

Humans have studied the concept of information for centuries. The English word comes from Middle French and Latin roots meaning teaching or creation. In the 14th century, it referred to training or instruction. During the transition from the Middle Ages to Modernity, the meaning shifted. It moved from the idea of giving "form" to matter to the idea of communicating something to someone.

In the modern era, the most significant influence is information theory. This field was established in the 1940s by Claude Shannon and others, building on earlier work by Harry Nyquist and Ralph Hartley.

Information theory is the scientific study of how we quantify, store, and communicate information. It sits at the intersection of many fields, including computer science, physics, and electrical engineering. A key measure in this field is entropy. Entropy quantifies the amount of uncertainty in a random process. For example, identifying the outcome of a fair coin flip provides less information than a roll of a six-sided die.

More uncertain events require more information to resolve that uncertainty.

Scientists use specific units to measure information. The bit is the standard unit. A bit is defined as that which reduces uncertainty by half. For instance, one fair coin flip provides exactly 1 bit of information. Two fair coin flips provide 2 bits. Another unit that can be used is the nat. The digital age for information storage truly began around the year 2002. By 2007, a study estimated that 97% of technologically stored information was already in digital bits.

Information can also be subjective, meaning it changes based on the observer. A single object can contain different information for different people. For example, a stone in a field provides different information to a geologist than it does to an archaeologist. The information depends on the person's educational background and their role in society.

This shows that information is closely tied to how we perceive and categorize the world around us.