The product is a lot of three vintage Texas Instruments Linear Circuits Data Books from 1992, volumes 1, 2, and 3. These data books provide valuable information on linear circuits and are a collector's item for vintage computing enthusiasts. With the brand being Texas Instruments, the books are likely to contain detailed and practical information on various linear circuits, making them a valuable resource for anyone interested in vintage computing and electronics.

Book 1 and 3 are in used condition, book 2 is new sealed. Book 3 has yellowing pages and bent pages.