
1) Radio technology
Found on
https://www.crosswordclues.com/clue/dyspan

The Dynamic Spectrum Access Networks (DySPAN) standards committee, formerly Standards Coordinating Committee 41 (SCC41), and even earlier IEEE P1900 Standards Committee, is sponsored by the Institute of Electrical and Electronics Engineers (IEEE). The group develops standards for radio and spectrum management. Its working groups and resulting stan...
Found on
http://en.wikipedia.org/wiki/DySPAN
No exact match found.