It comes from erasing all those math problems when you realize you did them wrong.
Not just math. According to my mom, when I was 6 and learning to write I was entirely dissatisfied with my formation of a capital B. I erased it so often I wore through the page (which was a school book) and then sulked under the dining room table for an afternoon. My Bs are better (especially with a keyboard), but I often wish I could retreat to my happy place.
OK, here's a question from my daughter's homework:
You buy a pack of 12 pencils at the store. How much did you likely pay?
a)$2.25 b)$10.25 c)$0.10
Her first answer: b). I'm sure the desired answer was a), but the last time I bought a dozen pencils from Staples, they cost ~$12 -- and they didn't even have erasers! (OK, it was a graded set of Steadtler pencils from 6B to 4H, Made In Germany)
BTW, the super-cheap pencils aren't worth it; the wood is so crappy, every time I sharpen them it uses about half the pencil to get a good point.
Intel has had some really unusal products in their past that never took off, inclinding a intelligent display controller. It displayed text only, but supported advanced features such as linked lists. Unusual, but about as successful as Intel's first 32-bit CPU, the iAPX432.
@antedeluvian, thanks for the tip on Math Input Panel. It could be useful when I need a nequation for an article.According to Microsoft's instructions, you type "amth Input Panel into the search and it will give find it for you.
I tried following the instructions but instead, Windows wanted to shut down. Fortunately, I could canel the process.
These have huge erases; I just got one for my niece since she went through 10 erasers in two weeks on her Kuro Toga. BTW, the Kuro Toga Roulette is the best mechanical pencil; it's metal, and rotates the lead every time you advance. I have the gunmetal version; I only wish Uni would make it in 0.3mm.
Most of the time, I prefer using pens, but I've been using pencils more after I got my Roulette and a Pentel GraphGear 1000. Another intesting option is Pilot's Frixion erasable pens; they actually work well, much better than the PaperMates of the late 1970's.
What are the engineering and design challenges in creating successful IoT devices? These devices are usually small, resource-constrained electronics designed to sense, collect, send, and/or interpret data. Some of the devices need to be smart enough to act upon data in real time, 24/7. Are the design challenges the same as with embedded systems, but with a little developer- and IT-skills added in? What do engineers need to know? Rick Merritt talks with two experts about the tools and best options for designing IoT devices in 2016. Specifically the guests will discuss sensors, security, and lessons from IoT deployments.