There is something called pressure navigation which depends upon the predictability of the winds across isobars to correct for crosswinds. By plugging the at-altitude atmospheric pressure and latitude, you can calculate the drift that would result if you held a straight-line course between the two points. Correct for the drift and hold that exact heading for the entire trip.
I've always meant to try this out some day, but have not gotten around to it yet. Of course this technique doesn't compensate for natural and man-made obstacles, especially the Temporary Flight Restrictions that follow the President around as he raises funds.
I'm not sure how well it aligns with today's concepts of "open source" but much of the early IBM 360/370 operating systems were distributed and maintained in source code format. So were major applications like IMS DB/DC (Information Management System).
I recall the huge uproar when IBM decided to withdraw access to the source. It was called their "Object Code Only" (OCO) policy and users were outraged. I still have some of the coke can wrappers passed out at a users group meeting making fun simultaneously of OCO and New Coke. (From a Google search, found this which references Feb. 8th, 1983 as the date of the OCO announcement.
There was a very active community within the major IBM users groups such as SHARE, sharing modifications to the systems. The best collection at the time was the CBT Mods Tape which was originally assembled by a Systems Programmer at Connecticut Bank and Trust. I guess it doesn't suprise me that it still exists (Thanks Google!) as it was an invaluable tool back when I was still involved with mainframes.
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I've always meant to try this out some day, but have not gotten around to it yet. Of course this technique doesn't compensate for natural and man-made obstacles, especially the Temporary Flight Restrictions that follow the President around as he raises funds.
I recall the huge uproar when IBM decided to withdraw access to the source. It was called their "Object Code Only" (OCO) policy and users were outraged. I still have some of the coke can wrappers passed out at a users group meeting making fun simultaneously of OCO and New Coke. (From a Google search, found this which references Feb. 8th, 1983 as the date of the OCO announcement.
There was a very active community within the major IBM users groups such as SHARE, sharing modifications to the systems. The best collection at the time was the CBT Mods Tape which was originally assembled by a Systems Programmer at Connecticut Bank and Trust. I guess it doesn't suprise me that it still exists (Thanks Google!) as it was an invaluable tool back when I was still involved with mainframes.