I'm in the 90th percentile in household salary in my country.
I'm single so double my salary to accomodate the 2.5 people living on average, and I jump to to the 93rd percentile.
You need to know the background which is
Statistics
Discrete Math
Algorithms
Most books on the subject assume you already know what linear regression is, Naive Beyes is just explained briefly theoretically and it goes right into the code in spark, R or Clojure for example. However UC Berkeley's course is very theoretical, almost no code is shown and its just MATLAB code (don't remember the name off the top of my head), their spark course though is heavy on the code with IPython activities.
Mac Mini is 1.5 years old, Mac Pro is >2 years old, 13" Macbook Pro is 1 year next month (and conspicuously absent from rumors of Apple's upcoming announcement event, gotta release those watch bands though).
The iPhone is definitely on a 1-year cycle, but it's not really something they put effort into maintaining on their computers. MacBook Air and iMac are probably the closest.
I blame iOS/Mac features tie-in like Continuity. OS X definitely gets the short end of the stick from that.
theres 500 stars in a radius of 50 light years. hopefully we will find plantes there, a planet 1400 ly away is cool but very distant still if we want to study it in detail
i uninstalled chrome and facebook, replaced with ff and tinfoil. much better battery life. only google apps i have is play music, google and translate (im rooted)