• There are X types/classes of...

• X is a type of...

A tablet PC is a type of notebook computer

Practice: use suitable classifying expressions to complete these sentences.

1. A computer ________________ hardware and software.

2. Peripherals _________________ three types: input, output and storage devices.

3. A word processing program __________________ software which lets the user create and edit text.

4. __________________ of network architecture: peer-to-peer, where all computers have the same capabilities, and client-server (e.g. the Internet), where servers store and distribute data, and clients access this data

Speaking

In pairs, describe this diagram, using classifying expressions. Make reference to your own devices.

Listening 2: Listen and fill in the missing words. Translate the text.

… as you can see on the diagram, a PC system ___________ of two parts: software and hardware. Software is the ______________ that enable a computer to perform a specific task: this _______________ the operating system, and application software such as a _______________ package and a ______ browser.

Hardware is any electronic or mechanical part. The basic structure of a computer system is _______ up of three main hardware sections: one, the _________ _______________ ________ - CPU - two, the main memory, and three, the________________.

The CPU is a processor _______ which executes program ________________ and coordinates the ______________ of all the other components. In order to improve the computer’s performance, the user can _______ expansion cards for video, sound and ___________________.

The main memory _________ the instructions and the _________ which are currently being processed by the_______. This internal memory is made up of ______ and RAM chips. RAM, or random access memory, is____________ , so it loses the stored data when the electricity - or power - is turned______. ROM, or _____________ memory, is non-volatile.

The peripherals are the physical units __________ to the computer. They include input, output and _____________ devices. Input devices, for example the _________________ and the mouse, enable us to present information to the computer. Output ______________ allow us to extract the results from the computer. For instance, we can see the output on the _____________ or in printed form. Storage devices are used to _________ information permanently. For example, we use hard disks, DVDs or flash ____________ to store large ________________ of information.

Speaking. Complete this diagram of a PC system using information of the unit. Describe the diagram making use of classifying expressions

Writing. Benefits of tablet PCs.

Your university department is considering buying tablet PCs to use in the classroom. Write a formal email to the head of the department explaining the benefits for the students and the teaching staff. (No less than 100 words).