Abbreviation:

1. ROM (Read Only Memory) – постоянное запоминающее устройство

2. RAM (Random Access Memory) – устройство с произвольным доступом; оперативная память

3. SRAM (Static Random Access Memory) – статическое RAM

4. DRAM (Dynamic Random Access Memory) – динамическое RAM

5. FPM DRAM (Fast Page Mode DRAM) – динамическая память с быстрым страничным доступом

6. SDRAM (SyncHronous DRAM) – синхронная динамическая память

7. PB SRAM (Pipelined [´paıplaınd] Burst SRAM) – статическая памятьс блочным конвейерным доступом

Task 6. Give the English definitions of the following concepts:

RAM, ROM, DRAM, SRAM, SDRAM, FPM DRAM

Task 7. Read the text and complete the sections of the table.

Storage devices

Medium Advantages Disadvantages

Floppy disk _____________ _________________

Fixed hard disk ______________ ________________

Removable hard disk ______________ _________________

CD-ROM disk ______________ _________________

Magneto-optical disk ______________ _________________

Magnetic tape ______________ _________________

A Most computers use floppy disks. Floppies conform to a standard and you can use them to carry data from one place to another. They are also very cheap, but they are slow and have a limited capacity.

B Almost all desktop computers have hard disks. They are fast and can store much greater amounts of data than floppies, but they are fixed inside the computer and you cannot use them to transfer data.

C You can move data from place to place using removable hard disks. They are almost as fast as fixed hard disks and also have high capacities, but they are relatively expensive. They do not all conform to one standard and they are not very common.

D CD-ROM disks are very common and conform to a standard. They are removable and can hold about 640 MB. They are also cheap to make. However, they are usually read-only. You cannot change the information on them. They are also slow compared to hard disks.

E Magneto-optical disks are like CD-ROMs, but you can write data on to them. They are removable, have large capacities, and last for a long time, but they are expensive and do not all conform to one standard. For this reason they are not very common.

F Magnetic tape is a cheap medium. You can use it to store very large amount of data, but it does not allow random access. Every time you read or write a piece of data, you start at the beginning of the tape. Tape drives are slow. Therefore, it is only suitable for doing backups.

Grammar: Present Simple (Indefinite) Tense

Форма	The Present Simple (Indefinite) Tense
Утвердительная	These keys move the cursor This key moves the cursor down.
Отрицательная	These keys don’t move the cursor. This key doesn’t move the cursor down.
Вопросительная	Do these keys move the cursor? Doesthis keymove the cursor down?

Структура специальных вопросов

Вопросительные слова	Вспомогательный глагол	Подлежащее и определение к нему	Смысловой глаголв форме инфинитива	Другие члены предложения
What What	do does	these keys this key	move move	? ?

Вопрос к подлежащему: What moves the cursor?

Task 7. Make these sentences negative. Put the questions to them.

1. This key moves the cursor down.

2. This key moves the cursor to the right.

3. This key inserts a character.

4. This key copies the screen display.

5. This key moves the screen up.

Task 8. Open the brackets and put the verb in the correct tense form.

1. He (to play) tennis very well. 2. We (to speak) English at our English lessons. 3. My father (to tell) us about his travel. 4. I (to speak) English well. 5. Our teacher (to ask) us many questions. 6. These foreign students (to speak) Russian. 7.He (to live) in hostel 8.I (to go) to the University by bus. 9.My sister (to help) me do my homework. 10.They (to listen) to the radio in the morning.

Task 9. Make up questions.

1. He lives in Moscow. ( where?) 2.I study at school? (where?) 3. He has 20 English books. (how many?) 4.They get up at 7 o`clock in the morning. (when)? 5.Pete does his homework every day. (who?) 6.They play tennis very well. (how?) 7.We have 2 lectures today. (what?) 8.Ann speaks English well. (who?) 9.She goes to school every day. (where?) 10.Lessons begin at 8 o’clock. (when)