In this day and age, when purchasing something physically at a shop we have those items’ bar codes scanned by the check-out (self-serve or otherwise). This is done to ensure both accuracy in pricing and to assist in inventory control. With books this bar code is based on a special number known as the ISBN.
When Marine Industries Ltd. of Sorel, Quebec delivered HMCS Assiniboine (II) to the Royal Canadian Navy it was the first post-war warship built by that yard for the RCN which subsequently commissioned her the 16th of August 1956.
While working away on the writing over the Easter break, my daughter was asking about the process I go through in writing a history of one of the destroyers in the book–I think she was surprised at how slow a process it can be at times.