input: [Pros] IM allows for real time "conversations" which may be more efficient than back and forth emails [Cons] IM conversations, especially detailed ones, can take much longer than the same conversation carried out on voice [Capability] 
output: Instant messaging
options: E m a i l
options: W e b - b a s e d a p p l i c a t i o n s
options: W e b c o n f e r e n c i n g
options: V o i c e o v e r I P
options: I n s t a n t m e s s a g i n g
options: B l o g g i n g