Page 40 - 4130

LESSON 7
PRINCIPLES OF INPUT-OUTPUT SYSTEM STRUCTURE

PART 1

Task 1. Learn the following words and word combinations:
Artwork, on-screen menu, shortcuts, a numeric keypad, invoke
certain program functions, trackball, touch pad, trackpoint, graphics
tablet, joystick, touch screen, USB port, USB keyboard, by
digitizing, OCR (Optical Character Recognition) software, playback,
MIDI (Musical Instrument Digital Interface), capture.

Task 2. Make up your own sentences using words and phrases
from the previous exercise.

TEXT 1
INPUT DEVICES
Before a computer can process your data, you need some
method to input the data into the machine. The device you use will
depend on what form this data takes (be it text, sound, artwork, etc.).
Keyboard
The computer keyboard is used to enter text information into
the computer, as when you type the contents of a report. The
keyboard can also be used to type commands directing the computer
to perform certain actions. Commands are typically chosen from an
on-screen menu using a mouse, but there are often keyboard
shortcuts for giving these same commands.
In addition to the keys of the main keyboard (used for typing
text), keyboards usually also have a numeric keypad (for entering
numerical data efficiently), a bank of editing keys (used in text
editing operations), and a row of function keys along the top (to
easily invoke certain program functions). Laptop computers, which
don’t have room for large keyboards, often include a “fn” key so that

38