Linux on IBMZ or Linux on zSystems is the collective term for the Linux operating system compiled to run on IBM mainframes, especially IBMZ / IBMzSystems
z/Architecture, initially and briefly called ESA Modal Extensions (ESAME), is IBM's 64-bit complex instruction set computer (CISC) instruction set architecture
IBM were jointly awarded The Queen's Award for Technological Achievement "for the development of ... the Z notation, and its application in the IBM Customer