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:a5548f6bf7a4538c01db26ffc5de5a8fd1b97817
NUMBERP thing NUMBER? thing outputs TRUE if the input is a number, FALSE otherwise.