types of computer presentation pdf

Types of Computers

Jul 20, 2014

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Types of Computers. By Mrs. Gonzales. Categories of computers. These include: 1) Personal computers 2) Laptops 3) Minicomputers 4) Mainframes 5) Supercomputers 6) Tablet PC 7) Electronic organizers and palmtop computers 8) Embedded computers. Personal Computers.

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• scientific research
• liquid crystal display
• mouse function
• electrical control signal
• special pen

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Types of Computers By Mrs. Gonzales

Categories of computers • These include: 1) Personal computers2) Laptops3) Minicomputers4) Mainframes 5) Supercomputers6) Tablet PC7) Electronic organizers and palmtop computers 8) Embedded computers

Personal Computers Personal computers (PCs), also sometimes called micro computer, are the most common type of computer. PCs are designed to be used by one person at a time and fit on an office desk, hence the other name, ‘desktop computers’. A PC consists of a system unit, a keyboard, a mouse and a display screen. It has all the functional elements found in any larger systems. It is designed to perform the input, control, arithmetic/logic, output and storage functions just like any other computer system would do. It can execute software program instructions to perform a very wide variety of tasks.

Laptops A laptop computer is portable version of a PC, equipped with a flat liquid crystal display (LCD) screen and weighing about 1 - 4 Kg. The two principle types of laptop computers are notebooks and sub-notebooks. Notebooks weigh 2 – 4 Kg and is roughly 35 x 25 x 4 in size. They have fairly large LCD colour screen and a fairly large keyboard, usually with a small touch-sensitive pad which serves as a mouse. They are usually just as powerful as a desktop PC but cost more than their equivalent desktop PC.

Laptops A sub-notebook computer weighs about ½ Kg and can fit in a large jacket pocket. It has a small screen, sometimes in colour, and a small keyboard without the mouse function. It can perform many of the functions of notebooks, but not to the same degree of complexity.

Minicomputers Mini systems were usually designed to handle simultaneously the processing needs of multiple users. They allowed many users to share access to central hardware through stations called terminals . Minis can support dozens of terminals. A typical terminal has a keyboard, a display screen and a wire that connects the terminal to the computer system. Minicomputers were mainly used in small manufacturing plants, research labs and businesses.

Mainframes Mainframes are very powerful computers and are therefore very expensive. Mainframes are systems that offer faster processing speeds and greater storage capacity than a typical mini. A mainframe can handle more than a thousand users at a time. They are found in large organizations such as banks, government agencies, insurance companies and corporations where they perform tasks that require a lot of computational power; typically, bulk data processing such as censuses, industry/consumer statistics and bank transaction processing. The IBM zSeries 990 Model D32 is currently one of the most powerful mainframe computers available.

Supercomputers Supercomputers such as NEC’s Earth Simulator and California Digital Corporation’s Intel Itanium2 Tiger4 were two of the largest, fastest and most powerful computers in the year 2004. They are typically used for ‘number crunching’ in scientific simulations, scientific research and developments in areas such as energy, space exploration , medicine and industry. Supercomputers are designed to process complex scientific applications. These systems are the most expensive computers in the world, often costing millions of dollars.

Tablet PC A tablet PC is a computer that looks like a notebook computer except that data can be entered through the use of a keyboard, touch screen or a digitizing tablet. Data can be entered through the digitizing tablet with the use of a special pen called a stylus.

Electronic organizers and palmtop computers These are so called because they can fit in the palm of your hand and are therefore less powerful than notebooks and sub-notebooks. They can fit into a shirt pocket and weigh perhaps 300 grams on average. They might have a very small keyboard, or a palm-sized screen (sometimes in colour) which can be written on with a special pen. Electronic organizers are mainly used to store appointments, addresses, phone numbers and ‘to do’ lists. Palmtop computers are more powerful than electronic organizers and can even run some of the same software as notebooks and sub-notebooks. Some cellular phones are now powerful enough to act as very small personal organizers.

Embedded computers An embedded computer is a special-purpose computer used inside a device and is usually dedicated to specific functions. It is housed on a single microprocessor board with the programs stored in ROM. It is connected to sensors – devices which detect changes in the environment such as light, temperature or pressure – and actuators, hardware output devices that convert electrical control signal into physical action. They are commonly used in items such as washing machines, cameras, cars, motors, sewing machines, clocks and microwaves.

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View, manage, and install add-ins for Excel, PowerPoint, and Word

When you enable an add-in, it adds custom commands and new features to Microsoft 365 programs that help increase your productivity. Because add-ins can be used by attackers to do harm to your computer, you can use add-in security settings to help protect yourself.

Note:  This article only applies to Microsoft 365 applications running on Windows.

View installed add-ins

You can directly install add-ins from this page or select  More Add-ins  to explore.

In the Office Add-ins dialog, select  My Add-ins  tab.

Select an add-in you want to view the details for and right-click to select  Add-in details  option.

Click a heading below for more information .  

Add-in categories explained

Active Application Add-ins      Add-ins registered and currently running on your Microsoft 365 program.

Inactive Application Add-ins      These are present on your computer but not currently loaded. For example, XML schemas are active when the document that refers to them is open. Another example is the COM add-in: if a COM add-in is selected, the add-in is active. If the check box is cleared, the add-in is inactive.

Document Related Add-ins      Template files referred to by open documents.

Disabled Application Add-ins     These add-ins are automatically disabled because they are causing Microsoft 365 programs to crash.

Add-in      The title of the add-in.

Publisher      The software developer or organization responsible for creating the add-in.

Compatibility      Look here for any compatibility issues.

Location      This file path indicates where the add-in is installed on your computer.

Description This text explains the add-in function.

Note:  Microsoft Outlook has one add-in option in the Trust Center: Apply macro security settings to installed add-ins . InfoPath has no security settings for add-ins.

Permanently disable or remove an add-in

To disable or remove an add-in follow these steps:

Select  File > Get Add-ins . Alternatively, you can select  Home > Add-ins .

In the Office Add-ins dialog, select  My Add-ins  tab.

Select an add-in you want to remove and right click to select  Remove  option.

View or change add-in settings

You can see and change add-in settings in the Trust Center, descriptions of which are in the following section. Add-in security settings may have been determined by your organization so not all options may be available to change.

Select  File  >  Get Add-ins .

Select  More Add-ins > Manage My Add-ins.

Select  Trust Center  >  Trust Center Settings  >  Add-ins.

Check or uncheck the boxes you want.

Add-in settings explained

Require Application Add-ins to be signed by Trusted Publisher      Check this box to have the Trust Center check that the add-in uses a publisher's trusted signature. If the publisher's signature hasn’t been trusted, the Microsoft 365 program doesn’t load the add-in, and the Trust Bar displays a notification that the add-in has been disabled.

Disable notification for unsigned add-ins (code will remain disabled)      When you check the Require Application Extensions to be signed by Trusted Publisher box, this option is no longer grayed out. Add-ins signed by a trusted publisher are enabled, but unsigned add-ins are disabled.

Disable all Application Add-ins (may impair functionality)      Check this box if you don't trust any add-ins. All add-ins are disabled without any notification, and the other add-in boxes are grayed out.

Note:  This setting takes effect after you exit and restart your Microsoft 365 program.

While working with add-ins, you may need to learn more about digital signatures and certificates , which authenticate an add-in, and trusted publishers , the software developers who often create add-ins.

Manage and install add-ins

Use the following instruction to manage and install add-ins.

To install a new add-in:

You can directly install popular add-ins on the page or go to More Add-ins  to explore. 

Select the add-in and select  Add . Or browse by selecting  Store  tab in the Office add-in dialog to find other add-ins to install and select Add for that add-in.

To manage your add-ins:

Select  File > Get Add-ins and from the bottom, select More Add-ins.  Or select  Home  >  Add-ins > More add-ins.

In the Office dialog, select My Add-ins tab. If you are not able to see your add-ins, select  Refresh to reload your add-ins.

Select  Manage My Add-in  to manage and select  Upload to browse and add an add-in from your device.

How to cancel a purchased add-in

If you've subscribed to an add-in through the Microsoft 365 Store that you don't want to continue, you can cancel that subscription.

Open the Microsoft 365 application and go to the Home  tab of the ribbon.

Select  Add-ins  and then select  More Add-ins > My Add-ins tab   to view your existing add-ins.

Select the app you want to cancel and select  Manage My Add-ins .

Under the Payment and Billing section choose Cancel Subscription .

Select  OK and then Continue .

Once that's complete you should see a message that says "You have cancelled your app subscription" in the comments field of your apps list.

Why is my add-in crashing?

Some add-ins might not be compatible with your organization's IT department policies. If that is the case with add-ins recently installed on your Microsoft 365 program, Data Execution Prevention (DEP) will disable the add-in and the program might crash.

Learn more about DEP

Get a Microsoft 365 Add-in for Outlook

Get a Microsoft 365 Add-in for Project

Taking linked notes

If you're looking for Help on linking notes in OneNote to a Word or PowerPoint document, see Take linked notes .

Excel Windows Add-ins

If you're looking for Help on specific Excel Add-ins, such as Solver or Inquire, see Help for Excel for Windows add-ins .

If you're looking for additional help with Excel add-ins using the COM Add-ins dialog box, see Add or remove add-ins in Excel .

Get a Microsoft 365 Add-in for Excel

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