Maybe they use the '80s flick "War Games" as a training film, too. The U.S. Defense Department is still using — after several decades — 8-inch floppy disks in a computer system that coordinates the operational functions of the nation's nuclear forces, a jaw-dropping new report reveals. The Defense Department's 1970s-era IBM Series/1 Computer and long-outdated floppy disks handle functions related to intercontinental ballistic missiles, nuclear bombers and tanker support aircraft, according to the new Government Accountability Office report.

The department's outdated "Strategic Automated Command and Control System" is one of the 10 oldest information technology investments or systems detailed in the sobering GAO report, which calls for a number of federal agencies "to address aging legacy systems." The report shows that creaky IT systems are being used to handle important functions related to the nation's taxpayers, federal prisoners and military veterans, as well as to the U.S. nuclear umbrella.

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"Federal legacy IT systems are becoming increasingly obsolete: Many use outdated software languages and hardware parts that are unsupported," the report found. "Agencies reported using several systems that have components that are, in some cases, at least 50 years old."



Our ultimate goal is to retire all of them as quickly as possible. Terence Milholland tech officer, IRS, on the agency's older IT systems

Defense has plans to upgrade its nuclear-related technology system soon. Lt. Col. Valerie Henderson, department spokeswoman, said: "This system remains in use because, in short, it still works. However, to address obsolescence concerns, the floppy drives are scheduled to be replaced with Secure Digital devices by the end of 2017. Modernization across the entire Nuclear Command, Control, and Communications (NC3) enterprise remains ongoing."

Other agencies are moving toward that more slowly, at best. More than 75 percent of $80 billion budgeted for federal IT efforts across all agencies in fiscal 2015 was spent on operations and maintenance investment, and such spending has increased in the past seven years, GAO noted. In contrast, spending on "development, modernization and enhancement" of federal IT systems has declined, according to GAO.

The office noted that the government plans to require agencies to identify which IT systems need to be updated, and then modify them. But until then, the GAO warned, "the government runs the risk of maintaining systems that have outlived their effectiveness."

In testimony to Congress on Wednesday, the chief technology officer of the IRS said that although the agency continues to operate a number of older IT systems, "it is not our preference to do so." "Our ultimate goal is to retire all of them as quickly as possible," said Terence Milholland, the IRS tech officer. GAO pointed out that aging systems include the Treasury Department's "individual master file," which is the authoritative data source for individual taxpayers. It's used to assess taxes and generates refunds. That file "is written in assembly language code — a low-level computer code that is difficult to write and maintain — and operates on an IBM mainframe," the report said.