1) I would like a list with supporting links of the top 10 U.S.
janitorial supply vendors.
2) I would like a bulleted list of the primary drivers of the U.S.
janitorial supply industry (i.e. How do vendors differentiate
themselves? Is it price driven or product driven? etc.)

The answers can be brief as long as links and sources are documented.
These answers should act as a jump off point for me to perform more in
depth research in this industry.