Microsoft Office Tutorials and References
In Depth Information
was developed to add codes for punctuation marks, symbols, such as $ and ©, and
additional characters, such as é and ü, that were not included in the original 128 codes.
Most computers use the original ASCII deﬁ nitions, but not all computers use the same
deﬁ nitions for Extended ASCII. Computers that run the Windows operating system
use the set of Extended ASCII deﬁ nitions deﬁ ned by the American National Standards
Institute (ANSI). Figure 5 shows sample ASCII code with ANSI standard Extended ASCII
Sample ASCII code representing letters and symbols
The hardware and the software of a computer system work together to process data
and commands. Modifying data is called processing . Commands are instructions to the
computer on how to process the data. For example, you issue a command in the word
processing program to instruct the computer to center the title in a report.
Processing tasks occur on the motherboard , which contains the processing hardware—
the computer’s major electronic components—and is located inside the computer. See
Figure 6. The motherboard is a circuit board , which is a rigid piece of insulating material
with circuits , or electrical paths, on it that control speciﬁ c functions.