IT’S A MARSHMALLOW WORLD

Less than five percent of Android phone owners have the new “Marshmallow” operating system. A third have the previous version, Lollipop. the rest are so far back the operating systems were written on stone tablets.

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THE CAR HACKER’S HANDBOOK

“The Car Hacker’s Handbook,” by Craig Smith is for the techie in the family. It’s an in-depth look at the computer-based systems in modern cars that make them vulnerable to attack. The book is $50 from No Starch Press.

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LEARNING TO SCRATCH

“The Official Scratch Jr. Book” by Bers and Resnick, is $20 from NoStarch Press and is designed to teach you, the adult, how to teach children ages five to seven, how to create programs using the computer language “ScratchJr.”

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FREE AUDIO BOOKS FROM THE BBC

BBC radio has free audio books on occasion. The website was too long, so we shortened it to Tinyurl.com/fredinspring. There you’ll find “Uncle Fred in Springtime,” by P.G. Wodehouse, read by a whole group of actors. Part one is available until Dec. 6, at which point they’ll put up part two.

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FREE DIGITAL BOOKS

Read.WorldReader.org offers free digital books through its free app for Android or iPhone. It has almost six million readers in 69 countries and offers 28,500 free books. We’re reading a book about Winston Churchill.

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THE END OF PRINTED TEXTBOOKS?

If your college textbook is available online, it’s probably a lot cheaper than the printed version. In fact, scanning books to put them online for sale sounds like a good business. Unfortunately, an advanced scanner costs $20,000, and of course there are copyright problems.

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BOOK EM!

Joy’s friend Frieda is going to France but leaving her Kindle behind for safe keeping. Joy said to her: “Why not use your phone as a Kindle?” Here’s how to do that:

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APP HELPS THOSE WITH MACULAR DEGENERATION

Spotlight Text” is $10 for iPhone and claims to make it possible for those with macular degeneration to read books on their tablets. We hope the creator, Dr. Howard J. Kaplan, will do the same thing for games like solitaire.

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THE NETFLIX OF BOOKS

OysterBooks.com, sometimes called “the Netflix of Books,” recently added a new service. Besides renting all the books you can eat for $10 a month, you can now buy books as well.

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HOW AN ENGLISH TEACHER MADE A BILLION DOLLARS IN CHINA

There are books and articles that offer advice on how to become a millionaire, but this one could be called How to Become A Billionaire. Instead, it’s called “Alibaba’s World,” written by Porter Erisman, a man who was there at the beginning of a company that went public in America last year at a valuation that exceeded Amazon and eBay combined. It was the largest initial stock offering ever.

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