Writing: put the words in the brackets into the correct form .
There aren different type of computer.the largest andmost powerful are mainframe computers.minicomputre are smaller than mainframecomputer but are still very powerful.mainframes are small enough to sit on the desk.they are more common type of computer.They are usually less powerful than mainframecomputer.portable computer are smaller than desktops .The largest portable is a laptop .small portable ,about size of picece of writing paper ,are called notebook computer.Subnotebook are smaller than notebooks.you can hold the smallest computers in one hand.They are called handheld computers or palmtop computers.
writing: The Editing keys:
the eiditing keys is the right of the mainkeyboard it include key Insert and Delete letter.it also include cursor key and arrow key .these keys move the cursor a round the screen.
Writing: fill in the blanks in this comparision of digital camera and film cameras .
Digital cameras don't use film. You picturs on to solid state memory.Then you inputthem to a memory card.You cancopy and improve the pictures in your PC. Then you canprintthem,add them to your webpage ,or presentation them on the screen.Digital cameras are more expensiveexpensivethan film cameras but the cost for each picture is lower because there is nofilm.It's also easy to takethe pictures.Film cameras are but each pictures cost a lot beacuse they aremuchcosts.the quality of film camera pictures is much betterthan digital cameras but you have to scanthe pictures to trasfer image to a PC.