Distributed data processing
Distributed data processing (DDP) was the term that IBM used for the IBM 3790 (1975) and its successor, the IBM 8100 (1979). "Datamation" described the 3790 in March 1979 as "less than successful."

Distributed data processing was used by IBM to refer to two environments:
* IMS DB/DC
* CICS/DL/I

Each pair included a Telecommunications Monitor and a Database system. The layering involved a message, containing information to form a transaction, which was then processed by an application program. Development tools such as program validation services were released by IBM to facilitate expansion.

Use of "a number of small computers linked to a central computer" permitted local and central processing, each optimized at what it could best do. Terminals, including those described as "intelligent", typically were attached locally, to a "satellite processor." Central systems, sometimes multi-processors, grew to handle the load. Some of this extra capacity, of necessity, is used to enhance data security. Years before open systems made its presence felt, the goal of some hardware suppliers was "to replace the big, central mainframe computer with an array of smaller computers that are tied together."
Q11223800
IBM 3790
MISC
Q11223803
IBM 8100
MISC
Q4037061
Datamation
MEDIA
Q1571984
IMS
MEDIA
Q1146247
CICS
MEDIA
Q2299300
DL/I
MEDIA
Q2382874
open systems
Concept
Q96376456
Distributed data processing
UNK
Q96376456
Distributed data processing
UNK
3790-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
3790
DATE
8100-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
8100
DATE
3790-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
3790
DATE
1979-03-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
March 1979
DATE
+1975^^http://www.w3.org/2001/XMLSchema#decimal
1975
NUMBER
+1979^^http://www.w3.org/2001/XMLSchema#decimal
1979
NUMBER
replaces