A mainframe is a massive computing system engineered for extreme reliability, throughput, and continuous operation. Banks, airlines, and large enterprises use them to handle millions of transactions per day without downtime. Unlike standard servers, they feature specialized processors for input and output operations and hardware redundancy that allows technicians to swap failing parts while the system runs.
Heard on the job
We need to schedule the batch job on the mainframe before the end-of-day processing window closes.
Insider tip
The defining trait of a mainframe is not just raw processing speed, but its massive input/output capacity and fault tolerance.