Microsoft (381)	OSS (277)	Total
Bug Fixing		141	79	220
	Fixing bugs	128	66	194
	Logical issues	10	5	15
	Security defects	2	7	9
	Incompatibility of the project	4	6	10
Maintainability issues		234	198	432
	Quality	137	138	275
	Ensure Readable Code	10	21	31
	Ensure Project Requirements	5	12	17
	Testable Code	7	6	13
	Ensure Maintainability	14	19	33
	Ensure Portability	2	11	13
	Style	19	15	34
	Design	55	27	82
	Other / Motivated to write better code	14	19	33
Facilitates Knowledge Sharing		189	86	275
	General knowledge sharing	35	73	108
	Solutions to Common Problems	10	-
	Generation of New Ideas	23	13	36
	Learn About Project	68	18	86
	Mentoring	25	-
	Developer growth	71	-
	improve coding practice	18	-
Helps to Strengthen Community/Collaboration		103	71	174
	Relationship Between Developers	3	4	7
	Strengthen Community	11	9	20
	Encourage Collaboration	23	16	39
	Perception of Expertise	7	29	36
	Enlightens team	74	-
	Other	-	36
General errors typos		68	54	122
	General errors/ typos	68	54	122
				0
Other		75	58	133