3P+S
The 3P+S Input/Output Module was an S-100 expansion card introduced to the microcomputer market by Processor Technology. It supplied three parallel ports and one serial port, the latter of which conformed to the RS-232C standard. One of the three parallel ports was dedicated to interfacing with the host computer over the S-100 bus, while the other two were available for general use.

An Altair 8800 equipped with a 3P+S could use one of the parallel ports to accept input from a keyboard and another to output to a TV Typewriter, allowing the user to construct an all-in-one machine that did not need an external computer terminal to work. This also left the serial port free, which could be used to drive a teletype machine as a computer printer, or a punch tape system for storage.

Processor Technology later combined the 3P+S with the VDM-1 graphics card in a compact S-100 machine of their own to produce the Sol-20, the first all-in-one mass-produced personal computer.
Q1546156
S-100 expansion card
Concept
Q32738
microcomputer
Concept
Q3922428
Processor Technology
ORG
Q190440
parallel port
Concept
Q385390
serial port
Concept
Q191895
RS-232C
MISC
Q223493
Altair 8800
MISC
Q6398237
keyboard
Concept
Q2472480
TV Typewriter
MEDIA
Q216640
computer terminal
Concept
Q66196
teletype
Concept
Q82
computer printer
Concept
Q66241
punch tape
Concept
Q55636860
VDM-1
UNK
Q4308
graphics card
Concept
Q3964167
Sol-20
MISC
Q16338
personal computer
Concept
Q86751989
3P+S
UNK
Q86751989
3P+S
UNK
Q86751989
3P+S
UNK
8800-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
8800
DATE
+3^^http://www.w3.org/2001/XMLSchema#decimal
3
NUMBER
-100^^http://www.w3.org/2001/XMLSchema#decimal
-100
NUMBER
-232^^http://www.w3.org/2001/XMLSchema#decimal
-232
NUMBER
-100^^http://www.w3.org/2001/XMLSchema#decimal
-100
NUMBER
+3^^http://www.w3.org/2001/XMLSchema#decimal
3
NUMBER
+3^^http://www.w3.org/2001/XMLSchema#decimal
3
NUMBER
-1^^http://www.w3.org/2001/XMLSchema#decimal
-1
NUMBER
-100^^http://www.w3.org/2001/XMLSchema#decimal
-100
NUMBER
-20^^http://www.w3.org/2001/XMLSchema#decimal
-20
NUMBER
instance of
part of