I have a MAC SE we bought in 1988. We have to decide whether to move it to the Island. It has not been out of its box since we moved to the Heartland 6 1/2 years ago. We kept it partly because the had one on display at the NY Museum of modern art.

For a class at UCSB in 1988 I wrote a BASIC program that could plot (fault) planes and slip directions on an equal area net. HW helped with the Trig. It could also calculate paleo-stress using the Right Dihedrons graphic method of Angelier and Mechler (?). It could take the bedding and unfold the faults and the slips on the faults.

It was no doubt badly programmed, and I never converted it to a more modern BASIC. But it worked.

I only program about once every 10 years and have not done any programming in 10 years. I used the same trig to convert earthquake focal mechanisms from catalogue format to creating surfaces (the nodal planes) and 3D vectors (the slip assuming one of the nodal planes was the fault, then the other. I kept about 8 of the parameters from the catalogue data. I used this program to get nodal planes and hypocenters into GOCAD format.

It runs only on MAC OS 8 or 9 and for this and other reasons, I have to keep my daughter's old original IMAC. I may recycle my 16 or 18 year old clunky MAC clone.

Chris