Computer Apps. Computer concepts. What is a Computer? Turning data into usable information.. inputperforms processingproduces outputA computer is a machine.

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Presentation transcript:

Computer Apps. Computer concepts

What is a Computer? Turning data into usable information.. inputperforms processingproduces outputA computer is a machine that receives input, performs processing, and produces output.

Input data entered into a computer

Processing - actions that computer programs perform on input.

Output results of processing such as a printed letter.

What is a computer A computer is a tool you can use for a variety of tasks including creating documents, storing information, playing games, learning a new skill, and connecting to the Internet.

Hardware Consists of the physical components that make up a computer. Tower Monitor Keyboard Mouse

Examples of Hardware CPU Monitor Keyboard Mouse Speakers Digital camera Printer Modem CD/DVD Burner Microphone Scanners

Software Is a set of programming instructions used to accomplish a certain task.

Operating System Handles common tasks of using a computer, including starting the computer, starting a program, printing a document, and storing a file. The operating system takes your commands and translates them into language that the hardware can understand.The operating system takes your commands and translates them into language that the hardware can understand.

All computers require an operating system to work. New computers come with an operating system. The most common operating system is Microsoft Windows.

Inside a Computer CPU-Central Processing Unit- “The Brain”CPU-Central Processing Unit- “The Brain” of the computer. It determines the speed and power of your computer.

Inside a Computer MotherboardMotherboard- is the main circuit board that moves data between components. All the devices inside a computer are connected to the motherboard.

Binary The CPU processes data and handles instructions using the binary system. BinaryBinary- uses two digits : 0 for off and 1 for on.

Bit The smallest unit of data A vast number of on and off switches

Byte To represent data, such as a letter, the computer groups together bits. A group of 8 bits is called a byte. The 8 bits can be arranged into 256 combinations.

Memory Memory is another determining factor in speed and performance. The more memory, the faster the computer (and the more expensive).

How Memory Works The processor stores basic instructions, but it cannot store programs or data. RAMTo store this information, the computer’s memory, is called RAM. Computer has two types of memory: ROM and RAM

ROM ROM-Read Only Memory-ROM-Read Only Memory- It is permanent storage, and can not be changed. –Contains data and instructions that have been burned in. –ROM contain instructions for starting a computer, checking for hardware devices, and starting the operating system.

RAM Random Access Memory Instructions and data that are stored temporarily in RAM. If you lose power all the data will be lost.

Expansion Slots allows you to add other devices such as a Video Card to the motherboard. Expansion Slots

Cards added to Expansion Slots Video Card-Video Card- an expansion that allows a user to capture video images and sounds. Modem Card-Modem Card- modems are used to communicate via the telephone with other computers through the Internet.

Bus Main communication path on the motherboard made of tiny wiresMain communication path on the motherboard made of tiny wires The size of the Bus is important because it affects the performance of a computer. The Bus size is measured in bits-16-bits, 32 bits, 64-bits.

E-Commerce business conducted on the Internet

Hacking data that can be stolen, erased, or modified

Copyright Laws software manufactures protect their product by copyrighting. Register the originality of a written or artist effort through the U.S. Copyright Office.

Software Licensing specifies on how many people can use the software and the number of computers on which the software may be installed

Flaming the act of posting insulting or abusive attacks on others through Internet connections.

Spamming The posting or sending of irrelevant and unwanted messages over the Internet.

Scanners an optical input device used to convert text and images into computer readable form.

Network a system of computers interconnect so they can share data and programs.

CD-RW compact disk method of data storage with capacity to record, be erased, and then reuse.

Monitor a device that receives output from a computer and displays it visually.

PDA (Personal Digital Assistant)- is a palmtop specialized to store phone numbers, calendars, schedules, and personal information.

DVD a high-capacity optical storage medium that includes both recording and playback.

Printer computer output device that provide hard copy, a permanent record of a computer’s output. LASER PRINTER INKJET PRINTER

Switch a standard telephone network in which each location has a number that is used to connect to the system.

Hard drive a magnetic storage device inside your computer system for permanent storage.

Computer Speed and MHz megahertz A. The clock speed of a computer is measured in megahertz. Hertz B. A Hertz is a single up and down movement of an electromagnetic wave. C. mega-millions of oscillating waves per second.

Hard Drives Vary 3 Ways Capacity (size)- measured in megabytes or gigabytes. –One megabyte would be equal to 1 to 1 1\2 floppy disks. Speed Drive standard

Digital Camera An input device that can instantly view and print pictures that you take without using film. Pictures are stored in the camera’s memory or on a memory card.

Netiquette Using proper manners when using an online service or the Internet

Netiquette Tips for When forwarding an be careful not to violate the sender’s privacy when forwarding an . Always cite materials that you gather from the internet. It is important to give other people credit for their work. Cool off before answering an from someone who has upset you.

Resist attacking the author of a posting. It is considered “Flaming” When you use capital letters, it is considered YELLING OR SHOUTING!! Keep your messages short. Just like in a letter, include a greeting and closing with your name. Fill in the subject line of an .