Booting Up And Shutting Down Computer
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To start up a computer, one must first turn on the AVR, then the CPU box via its power button, followed by the monitor via its power button. The computer will run hardware tests before the Windows desktop appears, at which point the Start button can be clicked to access programs. Proper shutdown involves clicking Start and selecting Turn Off, then turning off the monitor power button to power down fully.
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The document discusses the three main elements that make up a computer: peopleware, software, and hardware. Peopleware refers to the users of the computer. Software includes programs like operating systems and applications that provide instructions for the computer to function. Hardware are the physical parts of the computer, from the largest components down to the smallest pieces. All three elements are necessary for a computer to work.
Optical storagе
The document defines optical storage and discusses optical disc drives. It explains that optical drives use lasers to read and write data to optical discs by detecting light reflections from bumps and areas on the disc's surface. The document outlines different types of optical media like CDs, DVDs, and Blu-rays, as well as read-only, rewritable, double-sided, and double-layer media. It also describes how optical drives spin and move discs to read data and how recorders encode data onto discs using lasers.
Optical drive
An optical disc drive uses laser light to read and write data to optical discs. It contains a rotational mechanism that varies the disc's speed between 200-500 RPM depending on the disc's location. Optical drives also use either a tray-loading or slot-loading mechanism to insert discs. The laser is used to melt areas of the disc's recording layer, altering its crystalline structure to write data bits. The optic contains the laser, lens to guide the beam, and photodiodes to detect the reflected light and read the data.
Operating Systems - Processor Management
The document discusses how operating systems use processes and scheduling to allow multiple programs to run simultaneously. It explains that a process is the running instance of a program and contains the program counter, registers, memory allocation, and other state information. The operating system uses process scheduling and a process control block (PCB) for each process to track status, allocate CPU time, and handle interrupts and blocking for I/O. It outlines common scheduling algorithms like first-come first-served, shortest job next, priority, and round robin.
How to format a computer windows 7
Formatting a computer involves erasing all data on the computer's hard drive and reinstalling the operating system to restore the computer to its factory defaults. This can be useful for fixing computer issues or preparing to sell or donate a computer. The document provides step-by-step instructions for formatting a Windows 7 or Mac OS X computer by backing up files, booting from installation media, deleting existing partitions, and reinstalling the operating system.
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3) Step-by-step instructions are provided for common tasks with an emphasis on selecting options from drop-down menus or using keyboard shortcuts for efficient navigation and editing.
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Application Of Computers with Pictures
This document discusses the application of computers across various sectors of society:
1) Computers are used in business settings like banks with automatic teller machines.
2) Computers aid engineering work and are used in manufacturing like making cars.
3) Computers are implemented by the government in hospitals and by the Bureau of Internal Revenue.
4) Computers are found at home for personal use, in schools for education, and in science for experiments and simulations.
Application Of Computers To Society
Computers play a major role in many aspects of modern society. They are used for business purposes like keeping records and promoting products. Engineers use computers for drafting complex designs. Governments utilize computers to store citizen records and facilitate tasks. At home, computers provide entertainment and assist with schoolwork and other daily activities. Manufacturing relies on computers to operate machinery. Schools integrate computers into lessons, grading, and research. Scientists employ computers to model dangerous experiments and archive experimental data.
Booting Up And Shutting Down Computer
To start up a computer, press the power buttons on the AVR, CPU box, and monitor in that order. Wait for the hardware test and Windows desktop to load before using programs. To shut down properly, click Start and select Turn Off, then press the monitor power button and unplug the computer.
Proper Care Of Computers
Computers are important machines that store valuable data and information. It is crucial to properly care for computers so they continue functioning well and data is not difficult to retrieve. Some key ways to care for a computer include placing it in a clean, cool, dry area away from direct sunlight or liquids; regularly cleaning the external casing with a damp cloth; avoiding eating or drinking near it; covering it when not in use to prevent dust buildup; and using a surge protector and uninterrupted power supply to protect it from electrical issues and allow for safe shutdown during outages.
Application Of Computers
The document discusses the various applications of computers in different sectors of society. Computers are used in businesses like banks with automatic teller machines. In engineering, computers help engineers with their work. Computers are also used in government settings like hospitals. At home, computers can be used for entertainment purposes like playing games. Computers assist with manufacturing and are found in schools for activities such as computer-aided instruction. They also aid scientific work such as simulating cell division.
Computer Laboratory Rules
The document outlines 12 rules for students to follow when using the school computer lab. Key rules include behaving appropriately, treating others with respect, following teacher instructions, not eating or drinking in the lab, not altering computer files or settings without permission, and cleaning up before leaving. Students are asked to enjoy their time in the lab while following the guidelines.
What Is Computer
A computer is a machine that accepts data as input, processes it, and produces useful information as output. It can perform tasks like calculations at high speeds without errors. While computers are powerful tools, they require human programming and instructions to function. Computers have expanded capabilities like processing text and graphics. They are automated, have memory to store information for long periods, and can perform repetitive tasks accurately. Computers have become indispensable in modern society for tasks like accessing information online, entertainment, communication, and more.
Computer Laboratory Rules
The document outlines 12 rules for students using the computer lab. The rules instruct students to behave respectfully, follow directions, avoid changing computer settings or downloading unauthorized software, and ensure computers and the workspace are cleaned up before leaving. Violating the rules could interfere with normal computer operation.
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