Proper noun
Sheffer
A surname from German.
After section ✸8 the Sheffer stroke sees no usage. Source: Internet
He is survived by his wife of 56 years Barbara Jean; son Todd (Veronica Davidson) Sheffer; daughter Kelly (Kris Brommeland) Steele; sister Dorothy Hull; grandchildren Jaxon Steele, Brooke and Brandon Sheffer; numerous nieces, nephews and in-laws. Source: Internet
President Trump delivers remarks at Sheffer Corporation in Blue Ash, Ohio, on Feb. 5. In that speech, he told the crowd "history is not on our side" in the 2018 midterms. Source: Internet
An example would be the "grade up" character, which had to be made from a "delta" (shift-H) and a " Sheffer stroke " (shift-M). Source: Internet
Hence any formal system including the Sheffer stroke must also include a means of indicating grouping. Source: Internet
Sheffer interpreted the stroke as a sign for non-disjunction (NOR) in his paper, mentioning non-conjunction only in a footnote and without a special sign for it. Source: Internet