What is the difference between BES and BIS?

Related questions

1. What is BlackBerry BIS?
2. What is the difference between general purpose operating system and real time operating system?
3. How do I activate BIS on my BlackBerry?
4. What is QNX BlackBerry?
5. What is hard and soft RTOS?
6. Is QNX a RTOS?
7. How do I activate my BlackBerry service?
8. What is Qnix?
9. How do you activate BIS?
10. What is the difference between QNX and Linux?

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6. #managed
7. #individual
8. #advanced
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13. #corporate
14. #confused
15. #server
16. #blackberry
17. #wireless
18. #users
19. #world
20. #often
21. #features
22. #enterprise