I have started entering my old log books into digital form.
I got my first license in 1973, and have been doing ham radio since then, sometimes more , sometimes less.
For now I am using the Linux program Xlog. It has a simple data entry and a simple file structure that can be exported to some of the most common logbook formats, ADIF being the most relevant for me, I think.
Because I am using Linux more than anything for ham radio, some log programs were, of course excluded from consideration. I am well aware that there are several excellent logging programs available for windows. If I want something more elaborate, I will probably switch to CQRLog.
I did notice one significant (to me) weakness in the Xlog program, and that is counting of old (now deleted) DXCC entities. Examples for me are the old East Germany (DMxxx, Chekoslovakia (now 2 separate entities), the Baltic states, some Russian calls and Belarus, and, of course, the former Yugoslavian republics. I am sure that there are others, but those stood out for me.
I started doing my VHF/UHF logs, as those bands have my highest interest.
I have now reached November 1978 in the entries, just before I added 70cm to my activities. 1978 was a significant year for 2m activity, working many new DXCC entities and grid squares.
Entering the data will take some time due to thousands of QSOs to be entered, and I do not want to stop all other activities, so a few log pages per day is feasible. I will probably post some updates once in a while, as the data entry progresses. After the VHF/UHF entries, I intend to add all my HF QSOs, but that will not be for a while.
Also, one of the aims for this activity is adding the logs to online logs, such as eQSL and Logbook of the World, so people will be able to confirm QSOs that way. I will have to do the administration for getting there, but initially there will be (ir)regular update uploads to the QRZCQ site that I have registered to. I still need to upload the latest updates. This will probably happen when I have completed the 1978 VHF/UHF log entries, likely near the end of this year.