<s>
HP-150	B-Device
(	O
aka	O
HP	O
Touchscreen	B-Device
or	O
HP	O
45611A	O
)	O
was	O
a	O
compact	O
,	O
powerful	O
and	O
innovative	O
computer	O
made	O
by	O
Hewlett-Packard	O
in	O
1983	O
.	O
</s>
<s>
It	O
was	O
based	O
on	O
the	O
Intel	B-Device
8088	I-Device
CPU	B-Device
and	O
was	O
one	O
of	O
the	O
world	O
's	O
earliest	O
commercialized	O
touch	B-Device
screen	I-Device
computers	O
.	O
</s>
<s>
Like	O
other	O
"	O
workalike	O
"	O
IBM	O
PC	O
clones	O
of	O
the	O
time	O
,	O
despite	O
running	O
customized	O
MS-DOS	B-Application
versions	O
2.01	O
,	O
2.11	O
and	O
3.20	O
,	O
the	O
machine	O
was	O
not	O
IBM	B-Operating_System
PC	I-Operating_System
DOS	I-Operating_System
compatible	O
.	O
</s>
<s>
Its	O
8088	B-Device
CPU	B-Device
,	O
rated	O
at	O
8MHz	O
,	O
was	O
faster	O
than	O
the	O
4.77MHz	O
CPUs	B-Device
used	O
by	O
the	O
IBM	O
PC	O
of	O
that	O
period	O
.	O
</s>
<s>
However	O
,	O
its	O
mainboard	B-Device
did	O
not	O
have	O
a	O
slot	O
for	O
the	O
optional	O
Intel	B-Device
8087	I-Device
math	O
coprocessor	B-General_Concept
due	O
to	O
space	O
constraints	O
.	O
</s>
<s>
An	O
HP-150	B-Device
with	O
an	O
optional	O
hard	O
disk	O
was	O
called	O
HP	B-Device
Touchscreen	I-Device
MAX	I-Device
.	O
</s>
<s>
The	O
computer	O
's	O
screen	O
was	O
a	O
9-inch	O
Sony	O
CRT	B-Device
surrounded	O
by	O
infrared	O
emitters	O
and	O
detectors	O
which	O
detected	O
the	O
position	O
of	O
any	O
non-transparent	O
object	O
that	O
touched	O
the	O
screen	O
.	O
</s>
<s>
In	O
the	O
original	O
HP-150	B-Device
,	O
these	O
emitters	O
and	O
detectors	O
were	O
placed	O
within	O
small	O
holes	O
located	O
on	O
the	O
inside	O
of	O
the	O
monitor	O
's	O
bezel	O
(	O
which	O
resulted	O
in	O
the	O
bottom	O
series	O
of	O
holes	O
sometimes	O
filling	O
with	O
dust	O
,	O
causing	O
the	O
touchscreen	B-Device
to	O
fail	O
until	O
the	O
dust	O
was	O
vacuumed	O
from	O
the	O
holes	O
)	O
.	O
</s>
<s>
Like	O
the	O
original	B-Device
Macintosh	I-Device
,	O
HP-150	B-Device
was	O
packaged	O
with	O
the	O
CRT	B-Device
display	I-Device
as	O
a	O
single	O
unit	O
,	O
and	O
made	O
use	O
of	O
3½-inch	O
floppy	O
disks	O
.	O
</s>
<s>
Unlike	O
the	O
Mac	O
,	O
however	O
,	O
HP-150	B-Device
had	O
no	O
internal	O
floppy	O
drive	O
;	O
the	O
machine	O
sat	O
atop	O
the	O
phone	O
book-sized	O
9121D	O
dual	O
3½-inch	O
floppy	O
(	O
76mm	O
high	O
,	O
325mm	O
wide	O
,	O
285mm	O
deep	O
)	O
or	O
similarly	O
sized	O
hard	O
disk	O
devices	O
,	O
connected	O
by	O
HP-IB	O
.	O
</s>
<s>
Invisible	O
to	O
the	O
user	O
,	O
the	O
HP	B-Device
150	I-Device
runs	O
"	O
Terminal	B-General_Concept
Operating	O
System	O
"	O
(	O
"	O
TOS	O
"	O
,	O
code-named	O
"	O
Magic	O
"	O
during	O
development	O
)	O
.	O
</s>
<s>
This	O
operating	O
system	O
generally	O
runs	O
only	O
two	O
tasks	O
:	O
the	O
terminal	B-General_Concept
emulator	O
and	O
MST	O
(	O
which	O
is	O
Microsoft	B-Application
DOS	I-Application
)	O
.	O
</s>
<s>
HP-150	B-Device
'	O
s	O
touch	B-Device
screen	I-Device
sensor	O
grid	O
is	O
quite	O
coarse	O
.	O
</s>
<s>
HP	O
Model	O
CommandSet	O
#	O
FDD	O
FDDtype	O
Sides	O
FDD	O
capacity(each )	O
#	O
HDD	O
HDD	O
capacity	O
Notes	O
HP	O
82901M	O
Amigo	O
2	O
5.25	O
"	O
DS	O
270	O
KB	O
0	O
Add-on	O
only	O
HP	O
82902M	O
Amigo	O
1	O
5.25	O
"	O
DS	O
270	O
KB	O
0	O
Add-on	O
only	O
HP	O
9121D	O
Amigo	O
2	O
3.5	O
"	O
SS	O
270	O
KB	O
0	O
HP	O
9121S	O
Amigo	O
1	O
3.5	O
"	O
SS	O
270	O
KB	O
0	O
Add-on	O
only	O
HP	O
9122D	O
SS/80	O
2	O
3.5	O
"	O
DS	O
710	O
KB	O
0	O
HP	O
9122S	O
SS/80	O
1	O
3.5	O
"	O
DS	O
710	O
KB	O
0	O
Add-on	O
only	O
HP	O
9123D	O
SS/80	O
2	O
3.5	O
"	O
DS	O
710	O
KB	O
0	O
HP-150	B-Device
II	O
only	O
HP	O
9125S	O
Amigo	O
1	O
5.25	O
"	O
DS	O
360	O
KB	O
0	O
Add-on	O
only	O
.	O
</s>
<s>
BYTE	B-Application
in	O
November	O
1984	O
called	O
HP-150	B-Device
"	O
an	O
extremely	O
flexible	O
machine	O
"	O
,	O
but	O
"	O
difficult	O
to	O
program	O
"	O
.	O
</s>
<s>
The	O
two-CPU	O
HP-120	O
(	O
aka	O
HP	O
45600A	O
)	O
Z80	B-General_Concept
CP/M	B-Application
machine	O
also	O
used	O
the	O
9121	O
drives	O
.	O
</s>
<s>
HP-150	B-Device
II	O
(	O
aka	O
HP	O
45849A	O
)	O
replaced	O
HP-150	B-Device
in	O
1984	O
.	O
</s>
<s>
While	O
still	O
called	O
HP	O
Touchscreen	B-Device
II	O
,	O
the	O
touchscreen	B-Device
was	O
no	O
longer	O
standard	O
,	O
but	O
rather	O
a	O
rarely-adopted	O
option	O
.	O
</s>
<s>
The	O
optional	O
touchscreen	B-Device
bezel	O
was	O
superior	O
to	O
the	O
original	O
bezel	O
,	O
in	O
that	O
the	O
emitters	O
and	O
detectors	O
were	O
now	O
located	O
behind	O
a	O
solid	O
infrared-transparent	O
plastic	O
;	O
thus	O
removing	O
the	O
need	O
to	O
regularly	O
clean	O
the	O
holes	O
found	O
in	O
the	O
original	O
model	O
.	O
</s>
<s>
HP-150II	O
had	O
the	O
same	O
footprint	O
as	O
HP-150	B-Device
,	O
but	O
came	O
in	O
a	O
larger	O
housing	O
to	O
accommodate	O
its	O
12-inch	O
screen	O
,	O
but	O
could	O
no	O
longer	O
accommodate	O
an	O
internal	O
printer	O
.	O
</s>
<s>
HP-150II	O
had	O
four	O
expansion	O
slots	O
available	O
(	O
as	O
opposed	O
to	O
two	O
)	O
,	O
and	O
could	O
accommodate	O
an	O
optional	O
8087	B-Device
co-processor	B-General_Concept
board	O
.	O
</s>
<s>
There	O
were	O
some	O
minor	O
compatibility	O
problems	O
between	O
HP-150	B-Device
and	O
HP-150II	O
in	O
the	O
video	O
subsystem	O
.	O
</s>
<s>
In	O
1985	O
,	O
HP	O
introduced	O
the	O
Vectra	B-Device
,	O
which	O
InfoWorld	O
stated	O
was	O
the	O
company	O
"	O
responding	O
to	O
demands	O
from	O
its	O
customers	O
for	O
full	O
IBM	O
PC	O
compatibility	O
"	O
.	O
</s>
<s>
HP	O
repositioned	O
HP-150	B-Device
as	O
a	O
workstation	O
for	O
the	O
HP	O
3000	O
minicomputer	O
.	O
</s>
