Example

Engineering

Research Problem Design a sonar system for a submarine.

Key words navigational system, submarine, pulse generator, navigational system + water, echo ranging, sound navigation ranging

Larger subjects

detectors

electronics in navigation

ultrasonic equipment

signals and signalling + submarine

underwater acoustics

pigboat

submarine

u-boat

Narrower subjects

measuring instrument

measuring system

navigational system

acoustic pulse

nautical engineering

Synonyms
Synonyms for "sonar"

asdisc

echo ranging

echo sounder

sound navigation ranging

Synonyms for "submarine"

pigboat

u-boat

Different spellings

"sonar" = sound navigation ranging

"asdisc" = anti-submarine detection investigation committee

See a mind map.

You must identify all the above-mentioned words to help you when you start your search. Using different words may retrieve different information, therefore use all possible options when you search for information.

After searches were done on the Library on-line catalogue on some of the words identified above, the following was found:

Definition:
Library on-line catalogue
The Library on-line catalogue is a database of titles of all the books, journals and audio- visual resources available in the Library.

It is clear that you get different results from different words used in the searches. That is why it is so important to identify and follow up every possible word related to your topic.