помогите пожалуйста с английским

условие : Match the abbreviations with the definitions.

1 a secret number you need to operate a mobile phone, or use a credit card.
2 a disc that people usually use to watch films.
3 typical questions that people ask on a website.
4 a large collection of documents, pictures and sounds kept on computers in many different places and connected through the Internet.
5 a disc that computers can read, containing text, image and sound.
6 a system for finding exactly where you are in the world using satellites.
7 a way of sending a text message to a mobile phone​