-
The
user-executable
file
contain
the
executable
programs
designed
to
be
launched
or
started
by
users.
These
user-executable
files
typically
have
.exe
file
extensions.
The
support
programs
contain
The
graphical
user
interface
(GUI)
provides a way to
point and click a mouse
to
select
menu
options
and
manipulate
graphical objects
that are displayed on the
screen.
Single-user
operating
system
deals
with
one set of input
devices ----- those that can
be
controlled by one user at a time.
Multiuser
operating
system
deals
with
input, output, and
processing requests from
many users
----- all at the same time.
Multitasking
operating
system
provides
process and memory management services
that
allow
two
or
more
programs
to
run
simultaneously.
Network
operating
system
provides
communications
and
routing
services
that
Spreadsheet software
Number
crunching software
Data management
software
Graphics software
Music software
Wav
Mp3 is a music compression file format.
MIDI
stands
for
Musical
Instrument
Digital Interface.
Video
editing and DVD authoring software
Educational and reference software
Entertainment software
Business software
Installation and
Copyright
：
Installation basics
Distribution media
System
requirements
The installation process
The main executable files and data
files for
the
software
are
placed
in
the
folder
that
you specify.
Uninstalling
Delete
the
software’s
files
from
various
directories
on
the
computer’s
hard
disk,
also
remove
references
to
the
program
from
the
desktop
and
from
operating
system files.
Uninstall routine on the same menu as
the
program; Add/Remove program located
in
the
Control Panel.
Copyrights
License:
publishers
typically
use
2
techniques
to
validate
a
software
instructions
for
the
computer
to
use
with
the main user-executable
file. they
are not
designed to be run by users.
The
data
files
contain
any
data
that
is
necessary
for
a
task,
but
not
supplied
by
the user.
Most
programmers
today
prefer
to
use
high-level
languages
,
which
have
some
similarities
to
human
languages
and
produce programs that
are easy to test and
modify.
A
computer’s
microprocessor
only
allow
computers
to
share
data,
program,
and peripheral
devices.
Desktop
operating
system
is
one
that’s
designed for a personal computer.
Common operating system
Windows
Mac OS
UNIX
Linux
：
distributed
under
the
terms
of
a
General
Public
License
(GPL),
which
allows
everyone
to
make
copies
for
their
own use, to give to others, or to sell
.
DOS
Utility
programs
are
generally
used
to
support,
enhance,
or
expand
existing
programs in a
computer system.
Backup /Data
recovery/Virus protection
Data
compression/Defragmentation
Language
translators
All
system
software
and
applications
software
must
be
turned
into
machine
language for execution by the computer.
Application
Software
：
Document production software
Word processing
software
Desktop publishing software (DTP)
Web authoring
software
understands
machine
language
-----the
instruction set that is hard wired
within the
microprocessor’s
circuits.
High-level
languages help the programmer
produce
a
lengthy
list
of
instructions,
called
source
code
,
which
defines
the
software environment in every detail.
Machine
language
instructions
are
called
object code.
translating
instructions
from
a
high-level
language
into
machine
language
：
A
compiler
translates
all
of
the
instructions
in
a
program
as
a
single
batch
and
object
code
are
placed
in
a
new
file.
An
interpreter
converts
one
instruction
at
a
time while
the program is running.
System software
：
The operating
system (OS)
interacts with
application
software,
device
drivers,
and
hardware
to
manage
a
computer’s
resources.
Manage
processor/Manage
license:Shrink-wrap
agreements
Types of
software:
Commercial software
Shareware
Freeware
Open source software
licenses/Installation
memory/Manage files/Manage devices
The user
interface
界面
is the combination
of
hardware and software that helps people
and
computers
communicate
with
each
other.
Public domain software
File
Management:
A
computer
file
is
a
named
collection
of
data that exists on a storage medium.