If p and q are statements then ‘p not and q’, denoted by p ↑ q, is true unless both p and q are true. Since ‘not and’ is cumbersome language, this is often referred to as ‘nand’ in logic. The truth table is as follows:
- Aurobindo Ghose (1872–1950)
- Aurora
- aurora
- Aurora 7
- auroral oval
- auroral substorm
- aurous compounds
- Ausgleich (1867)
- AUSSAT
- Aussonderungsaxiom
- austenite
- austenitic stainless steel
- austerity measures
- Austerlitz, Battle of (2 December 1805)
- Austin, John (1790–1859)
- Austin, John Langshaw (1911–60)
- Australia
- Australia, fauna of
- Australian and New Zealand Journal of Statistics
- Australian Astronomical Observatory
- Australian faunal realm
- Australian Federation Movement (1890–1900)
- Australian Journal of Statistics
- Australian megafauna
- Australian Overland Telegraph Line