[Statement] OPEN CLOSE [Category] 
Input/Output
S t r u c t u r a l
D e c l a r a t i v e
F l o w o f c o n t r o l
I n t e r r u p t h a n d l i n g
S t o r a g e
I n p u t / O u t p u t
S t r e a m i n p u t / o u t p u t
R e c o r d i n p u t / o u t p u t