INSTRUCTIONAL DVD SET CONTAINING A VIDEO COURSE DESIGNED TO PROVIDE TEACHING AND EXPLANATORY GUIDANCE IN MATHEMATICS (CALCULUS). IT HAS 4 DISCS WITH 24 LECTURES OF 30 MINUTES PER LECTURE. THE DVDS ARE NOT INTERACTIVE.

CLASSIFICATION HAS BEEN DETERMINED IN ACCORDANCE WITH THE FOLLOWING:- GENERAL INTERPRETATIVE RULES (GIR)S GIR 1 HAS BEEN USED TO CLASSIFY THIS PRODUCT BY THE TERMS OF HEADING 8523 DISCS, TAPES, SOLID-STATE NON-VOLATILE STORAGE DEVICES, 'SMART CARDS' AND OTHER MEDIA FOR THE RECORDING OF SOUND OR OF OTHER PHENOMENA, WHETHER OR NOT RECORDED, INCLUDING MATRICES AND MASTERS FOR THE PRODUCTION OF DISCS, BUT EXCLUDING PRODUCTS OF CHAPTER 37 GIR 6 HAS BEEN USED TO CLASSIFY THE GOODS TO SUBHEADING LEVEL 852349 OPTICAL MEDIA; OTHER THAN UNRECORDED CN CODE 85234951 DISC FOR LASER READING SYSTEMS; DIGITAL VERSATILE DISCS (DVD) ALSO CLASSIFIED IN ACCORDANCE WITH HARMONISED SYSTEM EXPLANATORY NOTES (HSEN) (B) TO 8523