The original System/370 line was announced on June 30, 1970, with first customer shipment of the Models 155 and 165 planned for February 1971 and April 1971 respectively. The 155 first shipped in January 1971. … See more

IBM documentation numbers the bits from high order to low order; the most significant (leftmost) bit is designated as bit number 0.
S/370 also refers to a See more

The GNU Compiler Collection (GCC) had a back end for S/370, but it became obsolete over time and was finally replaced with the S/390 backend. … See more

• Hercules emulator
• IBM System/360
• IBM System/370-XA See more

Models sorted by date introduced (table)
The following table summarizes the major S/370 series and models. The second column lists the principal architecture associated with … See more

IBM replaced the System/370 line with the System/390 in the 1990s, and similarly extended the architecture from ESA/370 to ESA/390. This was a minor architectural change, and was … See more

I/O evolution from original S/360 to S/370
The block multiplexer channel, previously available only on the 360/85 and 360/195, was a standard part of the architecture. For compatibility it … See more