2005 (VID38) John Chandler and Dave Rennison credit pollen expert Rex Sawyer as the inspiration for this work. In his book Pollen identification Sawyer referred to the likely use of computer technology for production of an illustrated key, to replace the set of punched cards that accompanied his book when its was published in 1981. The micro slides were photographed using a 'x 40 lens' – the level of magnification that most beekeeping microscopists would use - explain the authors, who are members of the Harrogate & Ripon Beekeepers’ Association, UK. There is a step by step user guide, and ‘Sawyer’s spreadsheet’, a pollen identification key plus the common and scientific names of 151 plant species. PROCEEDS FROM THE SALE OF THE CD ARE DONATED TO SUPPORT THE WORK OF BEES FOR DEVELOPMENT TRUST. The book 'Pollen identifcation' by Rex Sawyer is also available (S005)