It has a screen but it's not TV, it has a keyboard and it's not a piano, what is it?

Keep more information than a regular disc, including illustration, sound and video?

I am full of buttons with numbers up to 9, if you want to talk to me with your grandmother, can you use me

who am I ?

A secret word or phrase that must be used to gain admission to a place.

Is the process of putting web pages, images and files onto a web server

Is the process of getting web pages, images and files from a web server.

It is the home page of a website.