TEC Numbering Scheme:
CFLT Numbering	0	1	2	3	4	5	6	7	8	9	10	11	12	13
Thumbwheel #	0	1	2	3	4	5	6	9	10	11	12	13	14	15
Traceback	0L	1L	2L	3L	4L	5L	6L	0R	1R	2R	3R	4R	5R	6R