Это был вирус Brain. Он являлся вирусом на систему MS-D0S. Он не мог заразить жёсткий диск, так как у него в программе этого встроено не было (специально). Был использован для нанесения ущерба тем, кто воровал пиратские копии медицинского программного обеспечения.
2) I knew that the first TV sets were black and white.
3) I knew that there were few TV channels originally.
4) I knew that TV screens used to be very small.
5) I don't understand how the first computer mouses were operated.
6) The developmet stages of a computer mouse.
7) The invention history of TV sets.
8) The first computer mouse was in the form of a wooden box
9) The first computer weigted several tons, operated very slowly and took much space.
10) Originally there was only one TV channel and it was only working during two or three definite hours.
2) I knew that first televisions were black and white.
3) I knew that first TV's had few channels.
4) I knew that in the past TV screens were very small.
5) I do not understand how the first computer mouse was manipulated.
6) The stages of the computer mouse development.
7) The history of invention of the TV.
8) The first computer mouse was a huge wooden box
9) The first computer weighed several tons, worked very slowly and took up a lot of space.
10) First TV's had only one channel which worked for only 2 or 3 specified hours.
1) 12:5=12/5=2 2/5 (гб) - первый
13÷5=13/5=2 3/5(гб) - второй
2) 2 2/5 + 2 3/5 = 4 5/5 = 5 (гб) - вместе
ответ: первый2 2/5 второй 2 3/5, а вместе 5 гб за месяц.