[High Praise! to XKCD]

(Alt Title text: “The days of the week are Monday, Arctic, Wellsley, Green, Electra, Synergize, and the Seventh Seal.”)
I need some help figuring out what some of these “group of 7” lists are.
Specifically, guacamole, data link, and Electra.

Data Link is probably the 7 network layers.
Specifically: http://en.wikipedia.org/wiki/OSI_model
Guacamole is in a seven-layer dip
And I think Electra is one of the seven sisters of the Pleiades
Okay, but sloths?
And what in world–there’s a “www.” prefix in the URL–since when? It’s always been “http://xkcd.com.” What gives?
Sloth is one of the seven deadly sins.
Deadly sins
PALE GAS: Pride, Anger, Lust, Envy, Gluttony, Avarice, Sloth.
As for Electra, it’s one of the 7 surviving tragedies of Sophocles.
Colossus of Rhodes. One of the 7 wonders of the world.
Europe. One of 7 continents.
Phylum. I had to look this one up. I hope that isn’t cheating. The term phylum is one of seven major categories that are used to classify organisms.
Sevens!!! She gave our babies SEVENS!!!
If you don’t get the reference, you stopped watching the Simpsons when it was still funny.
Dwarves
Bioclassification
Continents
Deadly Sins
Layer Dip
OSI
Wonders of the World
Days of the Week
Seas
Sister Colleges
Rainbow Colors
Pleiades
Habits of Highly Effective People
Of the Apocalypse
I actually knew (or figured out) all of those without Google, though I had to look up the specific name of the constellations.
Here’s seven for ya:
Moe Howard, Larry Fine, Jerome “Curly” Howard, Sam “Shemp” Howard, Joe (Fake Shemp) Palma, Joe Besser, (“Curly”) Joe DeRita.
Seven yer butt!…Sorry, I thought I was talking to my wife.
I didn’t think about it until now, but (and damn you IMAO for being peanut butter that sticks to the roof of my brain) I suddenly recalled a day in some history class I took in college where Prof pointed out that 7s (and 3s) are symbolically rampant through all cultures in all eras – particularly Judeo-Christianity (check out the Shield of the Trinity sometime to see 3 turn to 7 twice in the same ideology). If I remember the lesson that day, the argument was that it had to do with space and mathematics. Three to plot a point; seven to reach the center in the third-dimension. The social/religious expanded on these physical truths because they were so innate to our understanding of the physical world.
And it shows up everywhere. Art, food, music, you name it. People draw from 3s and 7s all the time.
Mickey Mantle
If only xkcd had a forum to explain / discuss its comics…
http://forums.xkcd.com/viewtopic.php?f=7&t=109830
“People draw from 3s and 7s all the time.”
Well, that’s better than drawing Aces and Eights.
..Wait, if Aces are a 1…8 minus 1 is….Damn you AT !!!
@12
Didn’t know that one, Karen, but I do know: “You cooked her nines!”
http://www.explainxkcd.com/wiki/index.php/1417