In this book, information technology is rethought as memory extension (extended memory technology), going beyond the common understanding of traditional information technology, which is based memory-desynchronized data and documents. In the first chapters, the author discusses the basic idea of (language-based) technology in philosophy and IT. A universal cognitive memory process theory is introduced and developed into the idea of a memory-extending basic information technology. Some concrete prototype features are introduced to demonstrate practical applications of the theoretical work.