Since
computers
were
first
introduced
(
introduced
)
to
the
public
in
the
early
1980's
,
technology
____________________
____________________
(
change
)
a
great
deal
.
The
first
computers
were
simple
machines
____________________
(
design
)
for
basic
tasks
.
They
____________________
____________________
____________________
(
have
,
not
)
much
memory
and
they
were
not
very
powerful
.
Early
computers
were
often
quite
expensive
and
customers
often
paid
thousands
of
dollars
for
machines
which
actually
did
very
little
.
Most
computers
were
separate
,
individual
machines
____________________
(
use
)
mostly
as
expensive
typewriters
or
for
playing
games
.
Times
____________________
(
change
)
.
Computers
became
powerful
machines
with
very
practical
applications
.
Programmers
____________________
(
create
)
a
large
selection
of
useful
programs
which
do
everything
from
teaching
foreign
languages
to
bookkeeping
.
We
are
still
playing
video
games
,
but
today's
games
became
faster
,
more
exciting
interactive
adventures
.
Many
computer
users
have
also
got
on
the
Internet
and
began
communicating
with
other
computer
users
around
the
world
.
We
____________________
(
start
)
to
create
international
communities
online
.
In
short
,
the
simple
,
individual
machines
of
the
past
____________________
(
evolve
)
into
an
international
World
Wide
Web
of
knowledge
.
