Facts and processes

When we write or talk about facts or processes that occur regularly, we use the present passive.

Examples:

1 Data is transferred from the internal memory to the arithmetic-logical unit
along channels known as buses.

2 The other users are automatically denied access to that record.

3 Distributed systems are built using networked computers.

Exercise 1 Read the text below, which describes the insurance company's procedure for

dealing with PC-users' problems. Fill in the gaps using the correct form of the verb in brackets.

All calls!___________ ________ (register) by the Help Desk staff. Each call

______________ (evaluate) and then_____________________

(allocate) to the relevant support group. If a visit 1_______________

(require), the user ' ____________ (contact) by telephone, and an

appointment ^b (arrange). Most calls

^{7__________________} (deal with) within one working day. In the event of a

major problem requiring the removal of a user's PC, a replacement can usually

^{8________________________________} (supply).

Exercise 2 Fill in the gaps in the following sentences using the appropriate form of the

verb in brackets.

1 The part of the processor which controls data transfers between the various
input and output devices___________________ (call) the control unit.

2 The address bus ______ (use) to send address details between the

memory and the address register.

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3 The pixel positions......

recognition software.

4 An operating system

(pass on) to the computer's pattern

(store) on disk.

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5 Instructions written in a high-level language_________________

(transform) into machine code.

6 In the star configuration, all processing and control functions
._______ __________ (perform) by the central computer.

7 When a document arrives in the mail room, the envelope

_____________________ (open) by a machine.

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8 Once the index

--._________ (store), a temporary key number

(generate) and___________________ (write) on the

document.

Exercise 3

Events

When we write or talk about past events, we use the past passive. Let us look at some examples.

Examples:

1 COBOL was first introduced in 1 959.

2 Microsoft was founded on the basis of the development of MS/DOS.

3 The organization was created to promote the use of computers in education.

Fill in the gaps in the following sentences using the appropriate form of the verb in brackets.

____________________ Ucundj oy bill Gates.

2 C language____________________ (develop) in the 1970s.

3 During that period, enormous advances. ________

computer technology.

4 The following year, twice as many PCs __ ____

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5 In the 1980s, at least 100,000 LANs___

laboratories and offices around the world.

6 The first digital computer Pennsylvania inl946.

. (set up) in

_ (build) by the University of
__ (launch) than ever

___ (take).

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