over a period of thirty-plus years, i've benefited countless times from this dizzyingly broad and accurate handbook. it must be seen in that light: handbook. but, as such, there is simply no competition, at least for the engineer doing mathematical evaluations or predicting performance. i myself even find it enjoyable to just read in it. also to remember: it is not a compendium of computer-based techniques; indeed, it is a handbook of actual mathematics. i appreciate this small forum as an opportunity to say: Thanks, K&K.