Category Archives: computing

Where’s My Petabyte Disk Drive?

Fourteen years ago I noted that disk drives were growing so fast I couldn’t fill them up. Between 1997 and 2002, storage capacity doubled every year, allowing me to replace a 3 gigabyte drive with a new 120 gigabyte model. … Continue reading

Posted in computing | 37 Comments

The Bug That Ate Thursday

As I was finishing up the previous post here at, I noticed something off-kilter about the appearance of a few mathematical expressions. Here’s an enlarged example: Notice the spacing around the minus sign. It’s too close to the argument … Continue reading

Posted in computing | 5 Comments

Number Factoids

The web sites and dish up a smorgasbord of facts about every natural number from 1 to 999,999,999,999,999. Type in your favorite positive integer (provided it’s less than 1015) and you’ll get a list of prime factors, a … Continue reading

Posted in computing, mathematics | 5 Comments

Deep Dreaming with Every Card I Write

My closest friends and family must make do with an old-fashioned paper-and-postage greeting card, but for bit-player readers I can send some thoroughly modern pixels. Happy holidays to everyone. In recent months I’ve been having fun with “deep dreaming,” the … Continue reading

Posted in computing, off-topic | 6 Comments

The long run

The other day I went over to Danehy Park in Cambridge, which has a fine 400-meter running track. I did four laps at my usual plodding pace. Here is my path, as recorded by an iPhone app called Runmeter: No, … Continue reading

Posted in computing, mathematics | 13 Comments