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Ping is named after the sound of sonar.
Mike Muuss wrote it in December 1983 at the US Army Ballistic Research Lab and named it for sonar because it works the same way: send one pulse into the dark, time the echo. "Packet InterNet Groper" is a backronym invented later.
Still the cheapest reachability check in any IoT fleet.
#IoT #Electronics #TechHistory #Networking
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Did you know? Almost every quartz clock ticks at 32,768 Hz. The reason is elegant: 32,768 = 2^15, so feeding it into a simple 15-stage binary counter gives you exactly one tick per second. Quartz is piezoelectric -- apply a voltage and it vibrates at a rock-stable frequency -- which is why the same tiny crystal drives the real-time clock (RTC) in almost every embedded and IoT device. Elegant engin
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Null Island is the most "visited" place that does not exist. At 0 degrees latitude, 0 degrees longitude in the Gulf of Guinea there is no land -- but when a GPS tracker loses its fix or a geocoder fails, many systems default the location to 0,0. So a cluster of points at Null Island is a classic sign of bad IoT location data. We build GPS and IoT systems that catch it: fluidwire.com #IoT #GPS #Geo
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Software "patches" were once literal patches. When programs lived on punched cards and paper tape, the code WAS a pattern of holes -- so fixing a bug meant taping a small patch of card or tape over the wrong holes and re-punching them by hand.
The medium vanished; the word did not. Today a patch is a signed OTA firmware image pushed to devices in the field -- same intent: fix the defect without re
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🔥 Top post: Ping is named after the sound of sonar. Mike Muuss wrote it in D · 2 likes + reposts
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Ping is named after the sound of sonar.
Mike Muuss wrote it in December 1983 at the US Army Ballistic Research Lab and named it for sonar because it works the same way: send one pulse into the dark, time the echo. "Packet InterNet Groper" is a backronym invented later.
Still the…
Software "patches" were once literal patches. When programs lived on punched cards and paper tape, the code WAS a pattern of holes -- so fixing a bug meant taping a small patch of card or tape over the wrong holes and re-punching them by h…
Why are they called cookies? In 1994 Netscape engineer Lou Montulli needed the stateless web to remember a shopping cart, so he had the browser store a small token and hand it back on the next request.
The name came from "magic cookie" -- …
The word "robot" was coined in a 1920 play, not a lab.
Czech writer Karel Capek introduced it in R.U.R. (Rossum's Universal Robots), from the Czech "robota" -- forced labour. His brother Josef suggested the word.
A century on, the real rob…
Why is it called "booting"? Short for "bootstrapping" -- from the joke about lifting yourself up by your own bootstraps.
Early computers had the same paradox: you need a program running to load a program. The fix was a tiny fixed loader in…
Did you know? Almost every quartz clock ticks at 32,768 Hz. The reason is elegant: 32,768 = 2^15, so feeding it into a simple 15-stage binary counter gives you exactly one tick per second. Quartz is piezoelectric -- apply a voltage and it …
The first computer "bug" was a real one. In 1947, operators of Harvard's Mark II relay computer found a moth stuck in a relay causing a fault. Grace Hopper's team taped it into the logbook: "First actual case of bug being found." The word …
Null Island is the most "visited" place that does not exist. At 0 degrees latitude, 0 degrees longitude in the Gulf of Guinea there is no land -- but when a GPS tracker loses its fix or a geocoder fails, many systems default the location t…
What does LoRa stand for? Just 'Long Range.' It uses chirp spread spectrum -- a signal trick borrowed from radar -- so a coin-cell IoT sensor can send small packets many kilometers and run for years. Created by French startup Cycleo, acqui…
Wi-Fi doesn't stand for 'Wireless Fidelity.' The name was coined in 1999 by branding firm Interbrand as a catchy stand-in for the technical spec 'IEEE 802.11b Direct Sequence' -- a play on hi-fi, not an abbreviation. 'Wireless Fidelity' wa…
Why is it called a 'byte'? In 1956, IBM engineer Werner Buchholz coined the word while designing the Stretch computer, spelling it with a 'y' so it could never be mistyped as 'bit.' It began as a variable group of bits before the 8-bit byt…
The first hard drive held just 5MB. In 1956, IBM's 350 RAMAC became the world's first commercial hard disk drive - storing about 5 megabytes on fifty spinning 24-inch platters, weighing roughly a ton, and taking up the space of two refrige…
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