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Yet Mr. Bricklin showed the way in 1979 with the spreadsheet program, a practical tool for business that allowed anyone with a personal computer to do financial modeling and simulation previously available only to corporations with mainframe computers and corps of research analysts.
Inside the campus, a collection of low-slung brick buildings dating to the 1950s, he was escorted on a tour of communications centers stranded in time, working rooms behind glass replete with mainframe computers, heavy phones and framed portraits of astronauts.
More than 60% of IT workers with mainframe experience are more than 50 years old.
Incidents involving mainframes are likely to have a significant business impact, so preparation is essential, both of any specialist tools and of staff with mainframe experience.
Sun's strategy is first to take away from third-party sales in its own Solaris environment and then sell to Windows NT and the various versions of UNIX operating systems, with mainframe connectivity coming last.
Today's digital innovators can trace a similar historical path that starts with mainframe computers and monolithic applications and then, step-by-step, reveals software's interchangeable parts until we arrive at today's cloud-based era of microservices and continuous integration.
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With mainframes it was about bookkeeping, which rode on a database called ISAM.
Large banks, for instance, are stuck with mainframes for their core systems because of high switching costs.
IBM, for instance, is still making money with mainframes.So the software cloud, just like its hardware underpinnings, will be very diverse.
It has also accused them of being "satellite proxies" of Microsoft, one of IBM's biggest competitors, which makes software that runs on servers that compete with mainframes.
Not the end of the world on a typical day 47% of PCs probably crash anyway but irritating.In fact, as with mainframes, the problem with PCs is not so much the hardware and operating system, but the application software.
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