To reference or cite the objects present in the Software Heritage archive, permalinks based on SoftWare Hash IDentifiers (SWHIDs) must be used. Select below a type of object currently browsed in order to display its associated SWHID and permalink.
swh:1:cnt:85d9d33afc9e8d7c2bd6f101d53bfba3156e4cc6
swh:1:dir:8ba0ca0978dd24ce138fe47ab1f59e02ee32e9b5
NUMBERP thing NUMBER? thing outputs TRUE if the input is a number, FALSE otherwise.