Computers
are
electronic
machines
____________________
process
information
.
They
are
capable
of
communicating
with
the
user
.
They
can
perform
five
kinds
of
arithmetic
____________________
,
and
make
three
kinds
____________________
decisions
.
However
they
____________________
incapable
of
thinking
.
They
accept
data
____________________
instructions
____________________
input
,
and
after
processing
____________________
information
,
they
output
the
results
.
When
____________________
about
computers
,
both
hardware
and
software
need
to
____________________
considered
.
The
first
____________________
refers
to
the
actual
machinery
,
and
the
second
one
to
the
programs
____________________
control
and
coordinate
the
activities
of
the
hardware
.
The
first
computer
____________________
built
in
1930
,
but
____________________
then
computer
technology
____________________
evolved
a
great
deal
.
____________________
are
three
different
kinds
of
computers
today
:
the
mainframe
,
the
microcomputer
and
the
minicomputer
.
All
three
have
one
thing
in
common
-
they
operate
quickly
and
accurately
in
solving
problems
.
