Academic Editions, Lab Packs and Site Licences are available to accredited schools or teachers at accredited schools. Academic Editions are identical to regular Retail editions but may require proper registration to be fully functional. Lab packs are sets (5 units unless otherwise stated) for use on an equal number of separate computers. Site Licences are for a larger number of computers, usually 16 or more, located either in one room or spread throughout a single building. An official school purchase order or other form of official documentation may be required to purchase Lab Packs or Site Licences.