Raj Computer & Typing Institute, Rawanwadi

Analog, digital, and hybrid computers are the three main types of computers. Analog computers  represent data as continuous values, such as voltage or current. They are used to solve problems that involve physical quantities, such as speed, temperature, and pressure. Analog computers are often used in scientific and engineering applications. Digital computers  represent data as discrete values, such as 0s and 1s. They are used to solve a wide variety of problems, including word processing, web browsing, and gaming. Digital computers are the most common type of computer in use today. Hybrid computers  combine the features of analog and digital computers. They are used for applications that require the speed and accuracy of analog computers, as well as the flexibility and programmability of digital computers. Hybrid computers are often used in military and industrial applications.   There are many different types of computers, each with its own strengths and weaknesses. Some of the most

Number System   The number system is something we use every day to complete our tasks and routine activities. For this, we have a system in place with unique symbols and specific values. This system becomes what we call a number system helping us calculate everything. The basic features of a number system are – unique symbols, consistency, comparable value results and are easy to reproduce. The Decimal system remains the most basic system used by humans with a base power of 10 but the same things can’t go for machines as well.  There are four number systems that a computer supports. They are –  Binary Octal Decimal Hexadecimal S.No. Number System Description Example 1 Binary Number System Base 2.  Digits used: 0, 1 11010 2 Octal Number System Base 8.  Digits used: 0 to 7 12570 8  3 Hexadecimal Number System Base 16.  Digits used: 0 to 9 Letters used: A- F 27FB 4 Decimal Number System Base 10. Digits used: 0 to 9 1234

Digital Signal   A digital signal is  a signal that represents data as a sequence of discrete values . A digital signal can only take on one value from a finite set of possible values at a given time. With digital signals, the physical quantity representing the information can be many things: Variable electric current or voltage. Digital signals do not produce noise. Examples of analog signals are Human voice, Thermometer, Analog phones etc. Examples of digital signals are  Computers, Digital Phones, Digital pens , etc. Examples of digital signals: Smart transmitters using various protocols transmit data through analog and digital signals. Digital watches. Digital video signals. CD's. DVD's. Computer.

Analog Signal   An analog signal is a continuous wave that represents a physical quantity, such as sound, light, or temperature, as an electrical voltage or current that varies over time. Unlike digital signals, which are composed of discrete values, analog signals can take on any value within a range of values, and they change continuously over time. For example, a microphone converts sound waves into an analog electrical signal that can be transmitted over a cable to an amplifier, which increases the strength of the signal. The analog signal is then sent to a speaker, which converts the electrical signal back into sound waves. Analog signals can be affected by noise, distortion, and attenuation as they travel over long distances or through different media. To minimize these effects, analog signals are often amplified and filtered to remove unwanted noise and interference.