Computers today. Гурьянова В.И. - 21 стр.

1998. In 2004, Logitech and Agilent Technologies introduced a laser mouse that
used a small laser, which increased the resolution of the image taken by the mouse.
Laser mice are wireless, which conserves power. 3D mouse was introduced in the
late 1990s. It was wireless and was worn on a ring around a finger. It was discontin-
ued because it did not provide sufficient resolution. Cabled mice typically use a thin
electrical cord to transmit their input. Cordless mice transmit data through infrared
radiation or radio. The mouse’s buttons have changed very little over the years, vary-
ing mostly in shape, number and placement. Most mice usually have between one
and three buttons. Two-button mice are the most common. The primary button is lo-
cated on the left hand side of the mouse, for the benefit of right-handed users. The
second button is usually used to invoke a contextual menu in the computer’s soft-
ware user interface, and is located on the right side.

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       1. The text “Computer Software” includes a number of subheadings.
Look through them and say what those parts of the text that go with them
might be about.
       2. Here are key words and expressions from two parts of the text.
Read the text and find the parts these expressions are from. How do the
words fit together?
       а) free of charge, downloading, to try out the program, a request for pay-
ment, distribution license.
       б)to store software, loaded into RAM, machine language, processor in-
structions, sequence of instructions, high-level languages, compiled or inter-
preted, assembly language, computer science, difference engine.
       3. Computer software is various. Can you think of some kinds of it?
Read the proper part of the text to find the answer.
       4. Did you find any new or interesting facts in the text? Share them
with the rest of the class.

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