To examine in order to prevent errors/a problem.

Not of the same kind; unlike other things.

person who purchases goods and services. People who buy goods or services.

Item that can be bought.

To keep in check, manage, or control something.

person who buys goods or services from shop or business.

achieving maximum productivity with minimum wasted effort or expense.

To rain very heavily.

action of helping or doing work for someone. Maintenance of machineries so it runs well, e.g. cars. To maintain a piece of machinery so it runs well.

sending and processing of mail and similar electronic communications. To communicate using text.

publicizing of product etc.. Acts of advertising a product to people.

course of action. Series of actions meant to achieve goals. To work in an organized, active way towards a goal.

facts provided or learned.

forming or viewed as unit apart or by itself. individual items of clothing suitable for wearing in different combinations. cause to move or be apart.

used for emphasis with following adjective functioning as adverb. thing that is unspecified or unknown.