IBM System/370

The IBM System/370 (S/370) is a model range of IBM mainframe computers announced on June 30, 1970, as the successors to the System/360 family. The series mostly maintains backward compatibility with the S/360, allowing an easy migration path for customers; this, plus improved performance, were the dominant themes of the product announcement. In September 1990, the System/370 line was replaced with the System/390.

For the printer, see IBM 370 printer.
System/370
DesignerIBM
Bits32-bit
Introduced1970
DesignCISC
TypeRegister–Register
Register–Memory
Memory–Memory
EncodingVariable (2, 4 or 6 bytes long)
BranchingCondition code, indexing, counting
EndiannessBig
PredecessorSystem/360
SuccessorS/370-XA, ESA/370, ESA/390, z/Architecture
Registers
General-purpose16× 32-bit
Floating point4× 64-bit
History of IBM mainframes, 1952–present
Market name
Architecture
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