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Mainframes. > Visa, for example, uses the mainframe to process billions of credit and debit card payments every year. > According to some estimates, up to $3

Mainframes. > Visa, for example, uses the mainframe to process billions of credit and debit card payments every year. > According to some estimates, up to $3 trillion in daily commerce flows through mainframes. https://www.share.org/blog/mainframe-matters-how-mainframes-keep-the-financial-industry-up-and-running https://www.share.org/blog/mainframe-matters-how-mainframes-... https://blog.syncsort.com/2018/06/mainframe/9-mainframe-statistics/ https://blog.syncsort.com/2018/06/mainframe/9-mainframe-stat... https://www.ibm.com/it-infrastructure/servers/mainframes https://www.ibm.com/it-infrastructure/servers/mainframes

andrewg 7y ago
Specifically they run IBM zTPF on their mainframes, which is also used by airlines. Some installations have uptimes measured in decades. https://www.ibm.com/it-infrastructure/z/transaction-processing-facility https://www.ibm.com/it-infrastructure/z/transaction-processi...
- wereHamster 7y ago
  It's rarely the hardware that fails, it's more often due to software. So I wonder what the software that's running on mainframes does differently than the software that's written for ordinary computers.
  - southerndrift 7y ago
    May it's not what it does but that it is written in COBOL?
  - Terretta 7y ago
    > So I wonder what the software that's running on mainframes does differently than the software that's written for ordinary computers. Not change.