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by wallflower 2535 days ago
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-...

https://blog.syncsort.com/2018/06/mainframe/9-mainframe-stat...

https://www.ibm.com/it-infrastructure/servers/mainframes
1 comments
andrewg 2535 days 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-processi...

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wereHamster 2535 days 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.
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Terretta 2535 days 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.

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southerndrift 2535 days ago
May it's not what it does but that it is written in COBOL?
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