The "Sourcebook for Programmable Calculators" is a hardcover textbook in the Texas Instruments electronics series, published by McGraw-Hill Companies in 1979. It is a comprehensive guide for programming calculators, with a focus on hardware and mobile devices. Written in English, this book is a valuable resource for those interested in the subject area of computers and electronics. The 2-pound weight of the book makes it a durable and substantial reference for students and professionals alike.