Tom,
I started on 1/26/70 with United Telephone of PA. Then it became United Telephone a Sprint Company which became Sprint United Telephone.
Sometime in the '80s it became Sprint. Being on the local dial tone side I was spun off from Sprint and we became Embarq around 2009 or 2010. Then Century Tel came along a few years before I retired and when I left it was Centurylink. I started as a CO tech in a X-Y office.Then I became a teletype tech. Went to business services(PBX) in '93 till the end. That sums up 41 years and two days in the telephone business. I enjoyed most of it and saw an awful lot of change. Pat F.