More people play golf than any other outdoor sport.  A
fifth of these are female.  Golf, like a keyboarding skill,
depends far more upon effort than physical strength.  Every
year millions of golfers walk over golf courses swinging at
a small, white ball with long, slender clubs.  The required
number of golf swings, or strokes, is the single measure of
one's golfing skill.  An expert player of golf will average
four strokes a hole.  This allows an average of two strokes
to reach the green and two strokes to putt the ball towards
and into the small hole.  This average score is called par.
     If a golfer can demonstrate superior skill and get the
ball into a par four hole in only three strokes, he is said
to have birdied the hole.  But, if the golfer requires more
than four strokes, he is said to have bogied the hole.  One
stroke over par is a bogie, two over a double bogie.  Quite
a rare event in golf is an eagle.  An eagle is a score that
the golfer receives when he requires two fewer strokes than
par allows to complete a hole.  A golf hole includes a tee,
a fairway, and a green.  A golf course consists of eighteen
holes.  The playing of all holes is called a round of golf.