In the beginning, God created the bit. And the bit was a 
zero.  On the first day, he toggled the 0 to 1, and the 
Universe was. In those days, bootstrap loaders were simple 
and "active low" signals didn't yet exist.

 On the second day, God's boss wanted a demo, and tried to 
read the bit.  This being volatile memory, the bit reverted 
to a 0. And the universe wasn't.
 God learned the importance of backups and memory refresh, 
and spent the rest of the day and his first all-nighter
reinstalling the universe.

 On the third day, the bit cried "Oh, Lord! If you exist, 
give  me a sign!"  And God created rev. 2.0 of the bit, even
better than the original prototype.
 Those in Universe Marketing immediately realized that "new 
and improved" wouldn't do justice to such a grand and 
glorious creation. And so it was dubbed the Most Significant 
Bit. Many bits followed, but only one was so honored.

 On the fourth day, God created a simple ALU with 'add' and
'logical shift' instructions. And the original bit 
discovered that by performing a single shift instruction, it
could become the Most Significant Bit. And God realized the
importance of computer security.

 On the fifth day, God created the first mid-life kicker, 
rev. 2.0 of the ALU, with wonderful features, and said 
"Forget that add and shift stuff. Go forth and multiply." 
And God saw that it was good.

 On the sixth day, God got a bit overconfident, and invented
pipelines, register hazards, optimizing compilers, 
crosstalk, restartable instructions, microinterrupts, race
conditions, and propagation delays. Historians have used 
this to convincingly argue that the sixth day must have been
a Monday.

 On the seventh day, an engineering change introduced
Windows into the Universe, and it hasn't worked right since.