Bre Pettis

MakerBot’s founder is on the edge of the 3-D printing revolution

2 min read
Bre Pettis
Photo: Joe Pugliese/August

In 2008, perennial tinkerer Bre Pettis was toiling away in a warehouse-turned-hackerspace in New York City when he ran into a wall. He and a few friends were participating in the RepRap project, which aims to build a self-replicating device capable of printing all the components needed to duplicate itself. But Pettis and his friends couldn’t make it work with the tools they had on hand.

The point of RepRap is to get 3-D printers diffused into communities around the world. “It’s a holy grail for tinkerers,” Pettis says, “the potential to be able to make anything.” In the end he and his friends threw out the self-replication requirement and started from scratch, this time to see if they could at least make a cheap but functional 3-D printer. They soon realized they could. Consequently, MakerBot was founded in January 2009, with Pettis as CEO.

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From WinZips to Cat GIFs, Jacob Ziv’s Algorithms Have Powered Decades of Compression

The lossless-compression pioneer received the 2021 IEEE Medal of Honor

11 min read
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Photo of Jacob Ziv
Photo: Rami Shlush
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Lossless data compression seems a bit like a magic trick. Its cousin, lossy compression, is easier to comprehend. Lossy algorithms are used to get music into the popular MP3 format and turn a digital image into a standard JPEG file. They do this by selectively removing bits, taking what scientists know about the way we see and hear to determine which bits we'd least miss. But no one can make the case that the resulting file is a perfect replica of the original.

Not so with lossless data compression. Bits do disappear, making the data file dramatically smaller and thus easier to store and transmit. The important difference is that the bits reappear on command. It's as if the bits are rabbits in a magician's act, disappearing and then reappearing from inside a hat at the wave of a wand.

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