Wk 2 - computers
- 1. HAMG - 1319 Computers in Hospitality
- 2. Hardware/Software Information Technology
- 3. Understand the Basic Concepts of Hardware, Software and Information Technology (IT). Hardware The term hardware refers to the physical components of your computer such as the system unit, mouse, keyboard, monitor etc. Software The software is the instructions that makes the computer work. Software is held either on your computers hard disk, CD-ROM, DVD or on a flash drive and is loaded (i.e. copied) from the disk into the computer.
- 4. Main Parts of a Personal Computer
- 5. Know the Main Parts of a Personal Computer: The Central Processing Unit (CPU) The CPU (Central Processing Unit) is normally an Intel Pentium (or equivalent) and it is one of the most important components within your computer. It determines how fast your computer will run and is measured by its MHz speed. Thus a 2 GHz Pentium is much faster than say a 1 GHz Pentium CPU. It is the CPU that performs all the calculations within the computer.
- 6. Know the Main Parts of a Personal Computer: The Hard Disk Hard disks are the main, large data storage area within your computer. Hard disks are used to store your operating system, your application programs (i.e. your word processor, games etc) and your data. They are much faster than CD-ROMs and DVDs and can also hold much more data.
- 7. Know the Main Parts of a Personal Computer: Common Input Devices What are some input devices that you see on the computer now? What additional input devices do you have on your personal computer at home?
- 8. Know the Main Parts of a Personal Computer: Types of Memory RAM The RAM (Random Access Memory) is where the operating system is loaded and also where your applications are copied to when you load an application, such as a word processor or database program. ROM The ROM-BIOS (Read Only Memory - Basic Input Output System) chip is a special chip held on your computer's system (mother) board. It contains software that is required to make your computer work with your operating system
- 9. Know the Main Parts of a Personal Computer: Understand the Term ‘Peripheral Device’ A peripheral device is any device that you can attach to your computer. Thus you could attach a scanner or modem to the back of your system unit.
- 10. Hardware
- 11. Understand the Term Central Processing Unit (CPU) and Know What the CPU Does The CPU is the brains within your computer. It performs most of the calculations within the computer and is responsible for the smooth running of your operating system (Microsoft Windows) as well as your application programs, such as word-processors, spreadsheets and databases.
- 12. Devices for Inputting Data The Mouse Used to ‘drive’ Microsoft Windows The Keyboard The keyboard is still the commonest way of entering information into a computer Wired wireless Tracker Balls an alternative to the traditional mouse and often used by graphic designers
- 13. Devices for Inputting Data cont. Scanners A scanner allows you to scan printed material and convert it into a file format that may be used within the PC Touch Pads A device that lays on the desktop and responds to pressure Light Pens Used to allow users to point to areas on a screen Joysticks Many games require a joystick for the proper playing of the game Still used by the traditional gamer Tablet PC’s & iPads Smart Phones
- 14. Output Devices
- 15. Common Output Devices Monitor The computer screen is used for outputting information in an understandable format for humans Printers There are many different types of printers. Which type of printer do you think is most commonly used in large organizations?
- 16. External Storage Devices Magnetic tapes Sequential access medium Magnetic disks Formatting Random access medium Diskette/floppy disks Zip disks Hard disks
- 17. External Storage Devices USB drives High-speed, high-capacity Hot-swapping, hot-plugging Optical disks Compact disc—read only (CD-R) Compact disc—read and write (CD-RW) DVD—optical storage device
- 18. Storage
- 19. Compare Memory Storage Devices Internal Hard Disks Speed: Very fast! The speed of a hard disk is often quoted as "average access time" speed, measured in milliseconds. The smaller this number the faster the disk. Capacity: Enormous! Often in excess of 100 Gigabytes. A Gigabyte is equivalent to 1024 Megabytes. Cost: Hard disks costs are falling rapidly and normally represent the cheapest way of storing data.
- 20. Compare Memory Storage Devices cont. DVD Drives Speed: Much faster than CD-ROM drives but not as fast as hard disks. Capacity: Up to 17 Gbytes. Cost: Slightly higher than CD-ROM drives.
- 21. Compare Memory Storage Devices cont. Flash Drives memory data storage devices integrated with a USB interface. USB flash drives offer potential advantages over other portable storage devices, particularly the floppy disk. They are more compact, generally faster, hold more data, and may be more reliable (due to their lack of moving parts) than floppy disks.
- 23. Some of the Factors that Impact on a Computer's Performance CPU speed RAM size Hard disk speed and capacity
- 24. Software
- 25. Know the Meaning of the Terms; Operating Systems Software & Applications Software Operating systems software The operating system is a special type of program that loads automatically when you start your computer. The operating system allows you to use the advanced features of a modern computer without having to learn all the details of how the hardware works Applications software An application program is the type of program that you use once the operating system has been loaded. Examples include word-processing programs, spreadsheets and databases
- 27. Understand the Main Functions of an Operating System The link between the hardware and you, the user Makes the computer easy to use without having to understand bits and bytes!
- 28. Understand the Term Graphical User Interface (GUI) A Graphical User Interface (GUI) is simply an additional part of the operating system that displays windows and drop down menus, and also enables you to drive your computer using a mouse. Examples of operating system that use a GUI include Windows Vista, Windows 7, Windows XP and Mac OS.
- 29. The Main Advantages of Using a GUI Interface. All programs look similar. When you switch from a program supplied by one manufacturer to one from a different manufacturer, you will find the transition very easy. Application programs work in the same way as the underlying operating system. The GUI also allows programmers to easily write consistent looking programs.
- 31. Some Common Software Applications and Their Uses Word processing applications Microsoft Word (preferred) Lotus Word Pro WordPerfect Spreadsheets Microsoft Excel (preferred) Lotus 123 Database Microsoft Access FileMaker
- 33. Definitions of Local Area Networks (LAN) and Wide Area Networks (WAN) LAN A LAN (Local Area Network) is a system whereby individual PCs are connected together within a company or organization WAN A WAN (Wide Area Network) as the name implies allows you to connect to other computers over a wider area (i.e. the whole world).
- 34. Definitions of Local Area Networks (LAN) and Wide Area Networks (WAN) cont. If ten people are working together with-in an office it makes sense for them all to be connected (networked). In this way the office can have a single printer and all ten people can print to it. In a similar way other devices such as modems or scanners can be shared. Even more useful is the ability to share information when connected to a network.
- 35. The Internet
- 36. What is the Internet? The Internet is a global network of interconnected networks. The unique thing about the Internet is the sheer amount of information that you can access from it. Whatever your interest you can search for and find information on the most obscure topics.
- 37. What is the Internet? cont. To search the Internet you use Internet search engines. These are easily accessed via your Internet browser (i.e. Microsoft Internet Explorer, Firefox and many more). Within the search engine you enter a word or phrase and it will retrieve documents from the Internet based on the information you typed in.
- 38. Computers in Everyday Life
- 39. Uses at Home Common uses for the computer within the home Computer games Home working Home banking Connecting to the Web
- 40. Uses at Work or in Education CBT (Computer Based Training) Computer Based Training (CBT) offers a low cost solution to training needs where you need to train a large amount of people on a single subject. These programs are normally supplied on CD-ROM and combine text, graphics and sound. Packages range from general encyclopaedias right through to learning a foreign language. Automated Production Systems Many car factories are almost completely automated and the cars are assembled by computer-controlled robots. This automation is becoming increasingly common throughout industry.
- 41. Uses at Work or in Education cont. Design Systems Many products are designed using CAD (Computer Aided Design) programs to produce exact specifications and detailed drawings on the computer before producing models of new products. Stock Control Stock control is ideal for automation and in many companies it is now completely computerized. The stock control system keeps track of the number of items in stock and can automatically order replacement items when required. Accounts / Payroll In most large organizations the accounts are maintained by a computerized system. Due to the repetitive nature of accounts a computer system is ideally suited to this task and accuracy is guaranteed.
- 42. Security, Copyright and the Law
- 43. The Purpose and Value of Backing-up Computer Files The most important thing that you store on your computer is information. Often the contents of a hard disk can represent years of work. If the hard disk stops working one day you could lose all those years of work. For this reason it is VITAL that you take regular backups of the information that is stored on the computer.
- 44. The Purpose and Value of Backing-up Computer Files cont. Organize your computer for more efficient back-ups Perform complete back-ups Use 'off-site' storage Beware of 'open files’ Use passwords Understand the importance of shutting down your computer properly
- 45. The Purpose and Value of Backing-up Computer Files cont. Use a UPS (Un-interruptible Power Supply) Use electrical surge protection Things computers like: Good ventilation Clean environment Stable, vibration free surface Things computers don’t like: Dust Drinking and eating over the keyboard Heat, Cold or Moisture Don’t place objects on top of monitors. Don’t place floppy disks near monitors.
- 46. Viruses
- 47. What is a Computer Virus? Computer viruses are: small programs that hide themselves on your drives. Unless you use virus detection software the first time that you know that you have a virus is when it activates. Different viruses are activated in different ways.
- 48. What is a Computer Virus? cont. How do viruses infect PCs? Viruses hide on a disk and when you access the disk (either a diskette or another hard disk over a network) the virus program will start and infect your computer. The worst thing about a computer virus is that they can spread from one computer to another, either via use of infected floppy disk, or over a computer network, including the Internet.
- 49. What is a Computer Virus? cont. How to prevent your computer from virus damage There are a number of third party anti-virus products available. Most of these are better than the rather rudimentary products available within Windows, but of course you do have to pay for them! The main thing about your virus checker is that it should be kept up to date.
- 50. Your Workspace
- 51. Good Working Environment Frequent breaks away from the computer Appropriate positioning of screens, chairs and keyboards Provision of adequate lighting and ventilation.