For those of you like me who thought there should not be a period after the S, According to https://www.trumanlibrary.gov/education/trivia/use-of-period-after

For those of you like me who thought there should not be a period after the S, According to https://www.trumanlibrary.gov/education/trivia/use-of-period-after-s-truman-name https://www.trumanlibrary.gov/education/trivia/use-of-period... > The evidence provided by Mr. Truman's own practice argues strongly for the use of the period. While, as many people do, Mr. Truman often ran the letters in his signature together in a single stroke, the archives of the Harry S. Truman Library have numerous examples of the signature written at various times throughout Mr. Truman's lifetime where his use of a period after the "S" is very obvious.