Technology technology gadgets The most technologically efficient machine that man has ever invented is the boo… Zen ⋅ April 22, 2020 The most technologically efficient machine that man has ever invented is the book. Like 0 Thanks! You've already liked this No comments « Dorothy Dandridge: Your 2 p.m. Buckeye Bits A&E trivia » The Awesome Hike In Massachusetts That Will Take You Straight To An Abandoned Castle Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website Current ye@r * Leave this field empty