<s>
TREK73	B-Application
is	O
a	O
computer	O
game	O
based	O
on	O
the	O
original	O
Star	B-Application
Trek	I-Application
television	O
series	O
.	O
</s>
<s>
It	O
was	O
created	O
in	O
1973	B-Application
by	O
William	O
K	O
.	O
Char	O
,	O
Perry	O
Lee	O
,	O
and	O
Dan	O
Gee	O
for	O
the	O
Hewlett-Packard	B-Device
2000	I-Device
minicomputer	B-Architecture
in	O
HP	B-Language
Time-Shared	I-Language
BASIC	I-Language
.	O
</s>
<s>
Trek73	B-Application
is	O
so	O
big	O
that	O
it	O
needs	O
the	O
CHAIN	B-Operating_System
feature	O
of	O
HP2000	O
BASIC	O
.	O
</s>
<s>
Unlike	O
many	O
other	O
Trek-themed	O
games	O
of	O
the	O
era	O
,	O
Trek73	B-Application
is	O
not	O
derived	O
from	O
the	O
well	O
known	O
Star	B-Application
Trek	I-Application
by	O
Mike	B-Application
Mayfield	I-Application
.	O
</s>
<s>
Trek73	B-Application
simulates	O
multi-ship	O
starship	O
combat	O
in	O
a	O
smaller	O
play	O
area	O
and	O
does	O
not	O
include	O
the	O
more	O
strategic	O
elements	O
of	O
the	O
original	O
,	O
like	O
starbases	O
and	O
the	O
galactic	O
map	O
layout	O
.	O
</s>
<s>
Dave	O
Korns	O
adapted	O
the	O
code	O
to	O
support	O
smart	B-General_Concept
terminals	I-General_Concept
,	O
using	O
the	O
cursor	O
control	O
characters	O
on	O
the	O
Hazeltine	B-Device
2000	I-Device
to	O
produce	O
an	O
in-place	O
updating	O
display	O
.	O
</s>
<s>
In	O
the	O
mid-1980s	O
,	O
Dave	O
Pare	O
and	O
Chris	O
Williams	O
translated	O
the	O
original	O
BASIC	O
version	O
into	O
C	B-Language
and	O
Jeff	O
Okamoto	O
,	O
Peter	O
Yee	O
,	O
and	O
others	O
corrected	O
and	O
enhanced	O
the	O
source	O
code	O
.	O
</s>
<s>
These	O
versions	O
are	O
widely	O
available	O
for	O
Unix-like	B-Operating_System
and	O
DOS	B-Device
operating	O
systems	O
.	O
</s>
<s>
The	O
game	O
simulates	O
battles	O
between	O
spaceships	O
of	O
the	O
Star	B-Application
Trek	I-Application
franchise	O
.	O
</s>
<s>
In	O
January	O
1973	B-Application
,	O
William	O
K	O
.	O
Char	O
began	O
programming	O
a	O
space	O
battle	O
game	O
in	O
BASIC	O
on	O
a	O
time-shared	O
Hewlett-Packard	O
2000C	B-Device
system	O
at	O
Wilson	O
High	O
School	O
in	O
San	O
Francisco	O
.	O
</s>
<s>
The	O
first	O
version	O
of	O
what	O
was	O
then	O
called	O
$SPACE	O
was	O
introduced	O
in	O
May	O
1973	B-Application
.	O
</s>
<s>
In	O
June	O
1973	B-Application
,	O
Char	O
,	O
Perry	O
,	O
Lee	O
,	O
and	O
Gee	O
started	O
programming	O
TREK73	B-Application
;	O
it	O
was	O
completed	O
October	O
8	O
,	O
1973	B-Application
.	O
</s>
<s>
Roderick	O
Perkins	O
adapted	O
TREK73	B-Application
for	O
the	O
DECISION	O
computer	O
at	O
the	O
Lawrence	O
Hall	O
of	O
Science	O
in	O
1974	O
.	O
</s>
<s>
Dave	O
Pare	O
and	O
Chris	O
Williams	O
at	O
the	O
University	O
of	O
California	O
,	O
Berkeley	O
independently	O
translated	O
TREK73	B-Application
into	O
the	O
C	B-Language
programming	I-Language
language	I-Language
in	O
1984	O
.	O
</s>
<s>
David	O
Soussan	O
then	O
ported	O
the	O
Okamoto/Yee	O
version	O
to	O
MS-DOS	B-Application
,	O
having	O
played	O
it	O
in	O
high	O
school	O
.	O
</s>
<s>
While	O
at	O
the	O
University	O
of	O
Iowa	O
,	O
Tom	O
Nelson	O
and	O
Mike	O
Higgins	O
played	O
and	O
made	O
modifications	O
to	O
TREK73	B-Application
on	O
one	O
of	O
the	O
University	O
HP2000	O
system	O
.	O
</s>
<s>
In	O
1984	O
they	O
created	O
Begin	B-Application
,	I-Application
A	I-Application
Tactical	I-Application
Starship	I-Application
Simulation	I-Application
for	O
MS-DOS	B-Application
.	O
</s>
<s>
Begin	O
was	O
not	O
a	O
port	O
of	O
TREK73	B-Application
.	O
</s>
<s>
It	O
was	O
written	O
in	O
C	B-Language
and	O
was	O
very	O
much	O
inspired	O
by	O
TREK73	B-Application
.	O
</s>
<s>
In	O
1993	O
Higgins	O
released	O
Begin	O
2	O
,	O
a	O
VGA	O
version	O
for	O
MS-DOS	B-Application
,	O
and	O
in	O
2009	O
Nelson	O
released	O
Begin	O
3	O
for	O
Windows	O
.	O
</s>
<s>
In	O
1985	O
while	O
at	O
the	O
University	O
of	O
Michigan	O
,	O
Howard	O
Chu	O
wrote	O
a	O
version	O
of	O
TREK73	B-Application
in	O
Turbo	B-Application
Pascal	I-Application
for	O
MS-DOS	B-Application
.	O
</s>
<s>
A	O
version	O
of	O
TREK73	B-Application
was	O
included	O
on	O
Disk	O
10	O
of	O
Fred	O
Fish	O
's	O
Fish	O
Disks	O
for	O
Amiga	B-Device
computers	I-Device
.	O
</s>
<s>
Around	O
1990	O
,	O
Chu	O
wrote	O
a	O
version	O
in	O
C/curses	O
for	O
the	O
Amiga	B-Device
.	O
</s>
<s>
Unlike	O
his	O
Turbo	B-Application
Pascal	I-Application
version	O
,	O
this	O
game	O
is	O
fully	O
implemented	O
.	O
</s>
