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| a computer can be a calculator,a media center,a communication center,and much more.the ability to change its programs is what distinguishes a computer from any other machine. |
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| is a programmable machine that converts raw data into useful information. |
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| information processing cycle ( IPC) |
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| The process a computer user to convert data into information. |
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| is entered into the system during the input stage |
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| the data being processed or manipulated ,to create useful information |
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| Data is collected from customers who submit a from on a website. |
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| The data is then manipulated,or processed,so it can be used to evaluate the customer's needs. |
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| the processed data-now information-is output as reports and charts that managers can use to help make decisions. |
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| The raw data is stored temporarily until it can be Processed. The processed information is stored for later retrieval. |
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| 1st thing you need to know sec 1 |
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| computers are programmable machines |
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| 2nd thing you need to know sec1 |
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the four steps of the information processing cycle (IPC)
are: input,processing,storage,output. |
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| 3nd thing you should know sec 1 |
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| The IPC converts raw data into useful information. |
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| In this article, we look at the evolution of computers in the past century -from the first generation massive machines of the 1930s and 1940s to the modern fourth -generation devices -and how Moore's Law has predication the exponential growth of technology. |
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| A tube that resembles an incandescents light bulb and was used in first-generaton computers. |
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| ENIAC(Electronic Numerical Integrator and Computer |
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| the first working,digital,general-purpose computer. |
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| A tiny electric switch used in second-generation computers. |
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| Are silicon chips that contain large numbers of tiny transistors. |
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| the chip that contains the central processing unit(CPU)of a computer. |
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| An observation made by Gordon Moore in 1965 that the number of transistor that can be placed on an integrated circuit had doubled roughly every 2 years. The current trend is closer to doubling every 18 months and is expected to continue for another 10 to 20 years. |
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| 1st thing you need to know sec 2 |
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| First-generation computers used vacuum tubes. |
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| 2nd thing you need to know sec 2 |
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| Second-generation computers used transistors. |
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| 3rd thing you need to know sec 2 |
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| third-generation computer integration circuits (chips). |
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| 4th thing you need to know sec 2 |
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| fourth-generation computers use microprocessors . |
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| 5th thing you need to know |
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| Moore's Law states that the number of transistors that can be placed on an integrated circuit doubles rough every 2 years. |
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| personal computers include desktop computers,which offer the most speed, power,and upgradable for the lowest cost ;workstations,which are compact desktop computers with the computer cases integrated into the monitor. portable personal computers include notebook,table,table PCs,and netbooks. |
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| is a small microprocessor-based computer designed to be used by one person at a time. |
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| are designed to sit on user's desk |
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| is used in a business environment to refer to a high-end desktop computer or one that's attached to a network. |
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| is a compact desktop computer with an integrated monitor. |
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| or laptop, computer are portable personal computer Today's notebook computer rival desktop in power and storage capacity-but at price. |
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| is a type of notebook computer that has a screen that can swivel to fold into what resembles a notepad or table. |
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| A lightweight,inexpensive computers are designed primary for Internet access. |
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| computers are built by apple and run the Mac OS x snow Leopard operation system. |
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| 1st thing you need to know sec 3 |
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| Desktop computer give you the most bang for your buck. |
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| 2nd thing you need to know sec 3 |
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| All-in-one computers are smaller but less upgradable desktops. |
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| 3rd thing you should know sec 3 |
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| Notebook computers are portable and have dramatically dropped price. |
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| 4th thing you should know sec 3 |
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| table PCs and notebooks ate specialized notebook computers. |
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| 5th thing you should know sec 3 |
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| The primary difference between a Mac and a PC is the operating system,not the hardware. |
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| the advantages to multiuser systems include centralized resources and security. |
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| are systems that allow multiple,simultaneous users to connect to them. |
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| are computers that provide services,such as Internet access,e-mail,or file and print services ,to client system. |
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| the smallest multiuser computer |
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| midrange servers that users connect to via personal computers. |
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| are large computers that can perform millions of transactions in a day. |
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| are very expensive computers systems that are used to perform complex mathematical calculations,such as those used in weather forecasting and medical research. |
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| distributes the processing of task across a group of computers. |
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| distributed computing using a few computers in one location. |
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| A form of distributed computing that relies on the processing power of hundreds or thousands of volunteers' personal computers. |
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| 1st thing you need to know sec 4 |
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| servers provide service such as file and print sharing and e-mail to client computers. |
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| 2nd thing you need to know sec 4 |
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| Minicomputers have largely been replaced by mid-sized servers that can support hundreds of concurrent users. |
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| 3rd thing you should know sec 4 |
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| Mainframes/enterprise servers can process millions of transactions in a day |
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| 4th thing you should know sec 4 |
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| Supercomputers perform complex mathematical calculations for such thing as weather forecasting and medical research. |
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| 5th thing you should know sec 4 |
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| Distributed computing distributes processing tasks across multiple computers. |
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| today , the term "computer" no longer refers only to those desktop devices used for office work.We carry computer with us everywhere we go. In some countries, mobile device have become the primary computing devices that many people have access to. |
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| are portable computers used for business and entertainment and come in many different shapes and sizes. |
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| have feature as internet and e-mail access , built -in cameras , GPS and mapping tools ,and even the ability to edit documents. |
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| GPS( global positing system ) |
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Definition
| consists of 24 satellites that transmit signals that can be picked up by a GPS receiver on the ground and used to determine its current location ,time,and velocity through triangulation of the signals. |
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| computers designed to be worn on the body. |
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| a computer that's designed primarily to play games . |
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| 1st thing you need to know sec 5 |
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| PDAs and smartphones are handheld,mobile computer. |
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| 2nd thing you need to know sec 5 |
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| GPS is a satellite-based navigation system. |
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| 3rd thing you need to know sec 5 |
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| Wearable are computers designed to be worn on the body. |
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| 4th thing you need to know sec 5 |
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| Today's video game consoles are seventh-generation system with high-end graphics and processing. |
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| using a computer for hours on end can literally be a pain in the neck. How you design your workspace can have a big impact on your comfort and health. It definitely require some research and effort on your part- but it's well worth it. |
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| is the study of the relationship between workers and their workspaces. |
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| 1st thing you need to know sec 6 |
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| Ergonomics is your relationship to your workspace. |
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| 2nd thing you need to know sec 6 |
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| A poorly designed workspace can cause health problems and makes you less productive. |
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| Technology actually becomes part of our environment. Digital sigage has replaced traditional billboards, we can pay for gas with the wave of a credit card,and we can upload pictures to facebook from our mobile phone. Smart homes-in which the lights,climate,security,and entertainment are automated-are a glimpse into the future of ubiquitous computing. |
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| Ubiquitous computing (ubicomp) |
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Definition
| Technology recedes into the background and becomes part of our environment. |
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| A specialized computer found in ordinary device ,such as gasoline pumps ,supermarket, checkouts,traffic lights and home appliances . |
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| the integration of technology on multifunction devices, such as smartphones,that has accustomed us to carrying technology with us . |
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| The efficient and eco-friendly use of computers and other electronics. |
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| 1st thing you need to know sec 7 |
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| Ubiquitous computing is technology that's invisible to us. |
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| 2nd thing you need to know sec 7 |
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| Embedded computing are found in everything from traffic lights to dishwashers. |
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| 3rd thing you need to know sec 7 |
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| The Convergence of technology allows us to carry a single multifunction device that can do the job of many separate devices. |
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| Computers are everywhere, and being computer fluent will help you in most career paths you might take like Bioinformatics. Auto mechanic,MCST and volunteer. |
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| is the application of information technology to the field of biology. |
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