July 31

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Podcast Episode

Day in Tech History: July 31st

Yesterday - Tomorrow - Day In Tech History

Prev: July 30 - Next: August 1 - Full Catalog list at Day in Technology History Project


Dr. Hawley Crippen was arrested when the boat he was on docked in Quebec. He was the first person to be caught as a result of a wireless telegraph.


Stephanie Kwolek was born. She was a scientist and creator of Kevlar


A six year research program found that Los Angeles smog was caused by chemical reaction between sunlight on auto and industrial emissions. The first occurrence of smog in Los Angeles was reported on 26 Jul 1943.


Apollo 15 astronauts become the first to ride in a lunar rover. Astronaut David Scott was the driver.


Radio Shack introduces the TRS-80 Pocket Computer manufactured by the Sharp Corporation, featuring a 24 character display, QWERTY keyboard, and 1.9kB of programmable memory. Price: US$230

Radio Shack introduces the TRS-80 Color Computer, featuring the Motorola 6809E CPU and 4kB RAM. Sharing the same case, keyboard, and layout as the AgVision/VideoTex terminals, it is hard to tell the TRS-80 Color Computer from its predecessors. Price: US$399

Radio Shack introduces the TRS-80 Model III, featuring a Zilog Z80 processor and 4kB RAM. Price: US$699


The DNA Advisory Committee of the National Institutes of Health approved experiments in gene therapy. The idea was to insert new genes into body cells to figure out mutation and hopefully cure disease.


The Interactive Digital Software Association announces a rating system for video games based on the violence, sex, and language it contains.


Windows NT 4.0 was released. This version of the operating system features an update of the user interface to match Windows 95.


Version 3.03 of Netscape Navigator is released.


Intel releases the 1.13 GHz Pentium III processor, incorporating 44 million transistors in a 0.13-micron process. Code-name: Tualatin


Felix Baumgartner becomes the first man to cross the English Channel by unpowered flight. He jumped from a plane about 30,000 feet above Dover, England and glided 22 miles across the Channel in a 10-min flight. Baumgartner was wearing a special suit with carbon-fibre wings across his back.


Sun announces they will entering into the Cloud by creating a business unit.

California judge rules that Sprints’ early termination fees are illegal


Google, in a heated debate over copyright law, pushes congress for a new and better copyright law.

Joel Tenenbaum was found liable, after testifying he did it, for violating copyright law in swapping music. Music studios focused on 30 songs. The final result was Tennbaum was ordered to pay $675,000 or $22,500 a song.


Twitter introduces ticker symbols for finance searches. Entering $Goog would get you Google's stock price, for example.

A Facebook post of "Where are they now" re-opened a 25 year old murder case where two brothers (Higher Brothers) were found innocent because one person (who thought they were innocent) went looking for clues and found them.

Hotmail announced a revamp of their mail system. Hotmail is now Outlook and includes Facebook, Twitter links.


Google, in conjunction with Level 3 Communications, will be providing Wifi at Starbucks locations. Wifi will be up to 10 times faster than AT&T, who had taken over the service from T-Mobile in 2008.

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