<s>
The	O
Macintosh	B-Device
"	O
System	B-Operating_System
1	I-Operating_System
"	O
is	O
the	O
first	O
version	O
of	O
Apple	B-Operating_System
Macintosh	I-Operating_System
operating	I-Operating_System
system	I-Operating_System
and	O
the	O
beginning	O
of	O
the	O
classic	B-Application
Mac	I-Application
OS	I-Application
series	O
.	O
</s>
<s>
It	O
was	O
developed	O
for	O
the	O
Motorola	B-Device
68000	I-Device
microprocessor	I-Device
.	O
</s>
<s>
System	B-Operating_System
1	I-Operating_System
was	O
released	O
on	O
January	O
24	O
,	O
1984	O
,	O
along	O
with	O
the	O
Macintosh	B-Device
128K	I-Device
,	O
the	O
first	O
in	O
the	O
Macintosh	B-Device
family	O
of	O
personal	B-Device
computers	I-Device
.	O
</s>
<s>
This	O
operating	O
system	O
introduced	O
many	O
features	O
that	O
would	O
appear	O
for	O
years	O
to	O
come	O
,	O
some	O
that	O
still	O
exist	O
in	O
the	O
current	O
macOS	B-Application
,	O
and	O
a	O
few	O
that	O
exist	O
in	O
other	O
graphical	O
operating	O
systems	O
such	O
as	O
Microsoft	B-Application
Windows	I-Application
.	O
</s>
<s>
The	O
features	O
of	O
the	O
operating	O
system	O
included	O
the	O
Finder	B-Application
and	O
menu	O
bar	O
.	O
</s>
<s>
In	O
addition	O
to	O
this	O
,	O
it	O
popularized	O
the	O
graphical	B-Application
user	I-Application
interface	I-Application
and	O
desktop	B-Application
metaphor	I-Application
,	O
which	O
was	O
used	O
under	O
license	O
from	O
Xerox	O
PARC	O
.	O
</s>
<s>
Due	O
to	O
the	O
limited	O
amount	O
of	O
random-access	B-Architecture
memory	I-Architecture
and	O
the	O
lack	O
of	O
an	O
internal	O
hard	B-Device
disk	I-Device
in	O
the	O
original	O
Macintosh	B-Device
,	O
there	O
was	O
no	O
multitasking	O
with	O
multiple	O
applications	O
,	O
although	O
there	O
were	O
desktop	B-Application
accessories	I-Application
that	O
could	O
run	O
while	O
another	O
application	O
was	O
loaded	O
.	O
</s>
<s>
Also	O
,	O
items	O
in	O
the	O
Trash	B-Application
were	O
permanently	O
deleted	O
when	O
the	O
computer	O
was	O
shut	O
down	O
or	O
an	O
application	O
was	O
loaded	O
(	O
quitting	O
the	O
Finder	B-Application
)	O
.	O
</s>
<s>
System	B-Operating_System
1	I-Operating_System
's	O
total	O
size	O
is	O
about	O
216	O
KB	O
and	O
contained	O
six	O
files	O
:	O
System	O
(	O
which	O
includes	O
the	O
desk	B-Application
accessories	I-Application
)	O
,	O
Finder	B-Application
,	O
Clipboard	O
,	O
an	O
Imagewriter	O
printer	O
driver	O
,	O
Scrapbook	B-Application
,	O
and	O
Note	O
Pad	O
.	O
</s>
<s>
A	O
separate	O
diskette	O
included	O
"	O
A	O
Guided	O
Tour	O
of	O
Macintosh	B-Device
"	O
,	O
which	O
contains	O
tutorial	O
demonstrations	O
of	O
the	O
Macintosh	B-Application
system	I-Application
,	O
running	O
on	O
a	O
modified	O
pre-release	O
version	O
of	O
Finder	B-Application
1.0	O
,	O
as	O
well	O
as	O
training	O
programs	O
for	O
learning	O
to	O
use	O
the	O
mouse	O
,	O
and	O
the	O
Finder	B-Application
.	O
</s>
<s>
Similar	O
to	O
the	O
one	O
found	O
on	O
Lisa	O
OS	O
,	O
the	O
System	B-Operating_System
1	I-Operating_System
Finder	B-Application
had	O
five	O
menus	O
:	O
the	O
Apple	O
menu	O
,	O
File	O
,	O
Edit	O
,	O
View	O
,	O
and	O
Special	O
.	O
</s>
<s>
While	O
within	O
the	O
Finder	B-Application
,	O
the	O
Apple	O
menu	O
contained	O
the	O
"	O
About	O
the	O
Finder	B-Application
"	O
information	O
,	O
along	O
with	O
the	O
desktop	B-Application
accessories	I-Application
.	O
</s>
<s>
"	O
Edit	O
"	O
had	O
entries	O
for	O
cutting	B-General_Concept
,	I-General_Concept
copying	I-General_Concept
,	I-General_Concept
and	I-General_Concept
pasting	I-General_Concept
.	O
</s>
<s>
"	O
Special	O
"	O
was	O
used	O
for	O
managing	O
the	O
hardware	O
and	O
other	O
system	O
functions	O
,	O
and	O
was	O
always	O
the	O
rightmost	O
entry	O
on	O
the	O
menu	O
bar	O
in	O
the	O
Finder	B-Application
.	O
</s>
<s>
In	O
System	B-Operating_System
1	I-Operating_System
,	O
the	O
menu	O
had	O
items	O
related	O
to	O
emptying	O
the	O
Trash	B-Application
,	O
cleaning	O
up	O
the	O
desktop	O
,	O
and	O
disk	O
options	O
.	O
</s>
<s>
By	O
System	O
1.1	O
,	O
the	O
menu	O
allowed	O
the	O
user	O
to	O
choose	O
an	O
alternate	O
startup	O
program	O
to	O
be	O
run	O
instead	O
of	O
the	O
Finder	B-Application
at	O
boot	O
time	O
;	O
the	O
feature	O
was	O
replaced	O
in	O
System	B-Operating_System
7	I-Operating_System
by	O
the	O
"	O
Startup	O
Items	O
"	O
folder	O
in	O
the	O
System	B-Operating_System
Folder	I-Operating_System
.	O
</s>
<s>
System	B-Operating_System
1	I-Operating_System
came	O
with	O
multiple	O
desk	B-Application
accessories	I-Application
(	O
DA	O
)	O
.	O
</s>
<s>
These	O
included	O
an	O
Alarm	O
Clock	O
,	O
Calculator	B-Operating_System
,	O
Control	B-Operating_System
Panel	I-Operating_System
,	O
Key	O
Caps	O
,	O
Note	O
Pad	O
,	O
Puzzle	O
,	O
and	O
Scrapbook	B-Application
.	O
</s>
<s>
A	O
difference	O
between	O
desktop	B-Application
accessories	I-Application
and	O
applications	O
is	O
that	O
multiple	O
desktop	B-Application
accessories	I-Application
could	O
be	O
run	O
at	O
once	O
but	O
only	O
one	O
application	O
could	O
run	O
at	O
a	O
time	O
.	O
</s>
<s>
Desk	B-Application
accessories	I-Application
could	O
also	O
run	O
on	O
top	O
of	O
an	O
application	O
.	O
</s>
<s>
Calculator	B-Operating_System
:	O
A	O
basic	O
calculator	B-Operating_System
capable	O
of	O
addition	O
,	O
subtraction	O
,	O
multiplication	O
,	O
and	O
division	O
.	O
</s>
<s>
Control	B-Operating_System
Panel	I-Operating_System
:	O
The	O
control	B-Operating_System
panel	I-Operating_System
was	O
used	O
to	O
adjust	O
some	O
of	O
the	O
settings	O
on	O
the	O
computer	O
.	O
</s>
<s>
What	O
made	O
the	O
original	O
control	B-Operating_System
panel	I-Operating_System
unique	O
from	O
subsequent	O
Mac	B-Application
OS	I-Application
control	B-Operating_System
panels	I-Operating_System
was	O
the	O
intended	O
absence	O
of	O
any	O
text	O
.	O
</s>
<s>
This	O
was	O
chosen	O
to	O
demonstrate	O
the	O
graphical	B-Application
user	I-Application
interface	I-Application
.	O
</s>
<s>
On	O
the	O
Macintosh	B-Device
128K	I-Device
,	O
Macintosh	B-Device
512K	I-Device
,	O
and	O
the	O
Macintosh	B-Device
Plus	I-Device
,	O
the	O
screen	O
brightness	O
was	O
controlled	O
by	O
a	O
mechanical	O
adjustment	O
wheel	O
beneath	O
the	O
screen	O
.	O
</s>
<s>
Key	O
Caps	O
:	O
A	O
DA	O
used	O
to	O
show	O
the	O
layout	O
of	O
the	O
original	O
Macintosh	B-Device
keyboard	O
.	O
</s>
<s>
It	O
showed	O
which	O
special	O
characters	O
could	O
be	O
produced	O
when	O
normal	O
keys	O
were	O
pressed	O
along	O
with	O
modifier	B-Device
keys	I-Device
(	O
Command	O
,	O
Shift	O
,	O
Option	O
)	O
.	O
</s>
<s>
Puzzle	O
:	O
A	O
basic	O
1	O
–	O
15	O
slide	O
puzzle	O
,	O
similar	O
to	O
the	O
picture	O
puzzle	O
found	O
in	O
later	O
versions	O
of	O
the	O
Mac	B-Application
OS	I-Application
.	O
</s>
<s>
Scrapbook	B-Application
:	O
This	O
DA	O
was	O
similar	O
to	O
a	O
cut	B-General_Concept
,	I-General_Concept
copy	I-General_Concept
,	I-General_Concept
and	I-General_Concept
paste	I-General_Concept
library	O
.	O
</s>
