As follows:

1. Toilet WC.

2. Doctor or doctor Dr.

3. Wait etc.

4. Personal computer PC.

5. The People’s Republic of China and the PRC.

6. United Nations UN.

7. MBA is the abbreviation of Master of Business Administration in English, which is a professional master's degree in business administration.

8. CD-ROM is the abbreviation of Compact Cisk-Read Only Memory in English, that is, compact disk read-only memory, which is often referred to as an optical drive.

9. DOS is the abbreviation of Dis Opening System in English, also known as disk operating system.

10. GDP is the abbreviation of Gross Domestic Product in English, that is, gross domestic product.

English abbreviations

Use the abbreviation of a word or phrase to represent a complete form, which is different from acronyms. English abbreviations are simple forms of English words that use important letters in English words to represent the meaning of the entire word. They are also called abbreviations.

An English abbreviation can be shortened in any way, by drawing some letter parts together. But abbreviations can cause confusion because they can mean different things in different industries.