2. Write three more sentences from your own subject area.

8)_____________________________________________________________________________

9)_____________________________________________________________________________

10_____________________________________________________________________________

2. Cohesion

! Cohesion means linking phrases together so that the whole text is clear and readable. It is achieved by several methods, such as the use of conjunctions and reference words and phrases which refer back to something mentioned before.

pronouns	he/she/it/they
objective pronouns	her/him/them
other phrases	the former/the latter/the first/the second
possessive pronouns	his/her/hers/their/theirs
demonstrative pronouns	this/that/these/those

3. Read the following paragraph and complete the table.

Ken Thompson (1943) was the principal inventor of UNIX. It is a multiuser, multitasking operating system. He received his Bachelor's and Master's degrees, both in electrical engineering, from the University of California at Berkeley (UCB). Soon thereafter, in 1966, he was hired by Bell Labs. The latter appears to be a research and development arm of AT&T. In 1973 Thompson made his first public presentation about UNIX. It was noticed by the right people at UCB, and this led to the first copy of the operating system being shipped to that university.

The UNIX source code is distributed freely throughout the 70s, and it soon becomes popular at universities and research labs.

Reference	Reference word/phrase
Ken Thompson s
UNIX
The UNIX source code
first public presentation
the latter…
noticed

3. Definitions

! Definitions are normally needed in two situations:

a) In introductions, to clarify a word or phrase in the title.

b) More generally, to explain a word or phrase that may be either very technical (and so not in normal dictionaries), or very recent, or with no widely agreed meaning.

Word	Category	Detail	Use
3D modeling	is the process	of developing a mathematical representation of any three-dimensional surface of object,	used in a computer simulation of physical phenomena

4. Insert suitable category words in the following definitions.

1. Computer animation is the __________ used for generating animated images by using computer graphics.

2. Descriptive geometry is the __________ of geometry which allows the representation of three-dimensional objects in two dimensions.

3. Virtual reality (VR) is a __________ that applies to computer-simulated environments.

4. VRML is a standard __________ for representing 3-dimensional (3D) interactive vector graphics.

5. Computer-aided manufacturing (CAM) is the __________ of computer software.

6. Computational science (or scientific computing) is the __________ of study concerned with constructing mathematical models and quantitative analysis techniques.

7. A Non-Linear Processor (NLP) algorithm is __________ to eliminate residual echo.

! More complete definitions may be written by adding examples or extra information:

Virtual reality (VR) is a term that applies to computer-simulated environments that can simulate physical presence in places in the real world, as well as in imaginary worlds.