1. We know about symbols. We do indicate to our teacher that we wish to go out to drink water.
2. We know the signs for addition, subtraction, multiplication and division.
3. We might have used the symbols for ‘greater than’, ‘less than’, ‘equal to’ etc.
4. Symbols play an important role in our life.
5. They convey precise meaning with few descriptions.
6. Some common electric components can be represented by standard symbols.