If you want to participate in world memory championships, this book is for you. It includes all the material required to be learned for championships. The World Memory Championships is an organized competition of memory sports in which competitors memorize as much information as possible within a given period of time. The championship has taken place annually since 1991, with the exception of 1992. It was originated by Tony Buzan and co founded by Tony Buzan and Ray Keene. It continues to be organized by the World Memory Sports Council (WMSC), which was jointly founded by Tony Buzan and Ray Keene. In 2016, due to the dispute between some players and WMSC, the International Association of Memory (IAM) was launched From 2017 onward, both organizations have hosted their own world championships. The World Championships consist of ten different disciplines, where the competitors have to memorize as much as they can in a period of time: 1. One hour numbers (23712892....) 2. 5-minute numbers 3. Spoken numbers, read out one per second 4. 30-minute binary digits (011100110001001....) 5. One hour playing cards (as many decks of cards as possible) 6. 15-minute random lists of words (house, playing, orphan, encyclopedia....) 7. 15-minute names and faces 8. 5-minute historic dates (fictional events and historic years) 9. 15-minute abstract images (WMSC, black and white randomly generated spots) / 5-minute random images (IAM, concrete images) 10. Speed cards - Always the last discipline. Memorize the order of one shuffled deck of 52 playing cards as fast as possible.

"How to Catalogue a Library" by Henry B. Wheatley is a book on nineteenth-century theories of knowledge organization and retrieval of information. Those who are interested in library work are constantly asked where a statement of the first principles of cataloging may be found, and the question is one that is not easy to answer. Most of the rules which have been printed are intended for large public libraries and are necessarily laid down on a scale that unfits them for use in the making of a small catalog.