http://book.klll.cc/ebooks/author/56730.opds 2025-11-15T06:52:47Z Books by Halacy, D. S. (Daniel Stephen) Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2025-11-15T06:52:47Z https://book.klll.cc/ebooks/72572.opds Computers—the machines we think with D. S. Halacy