One of the constraints for Small and Medium Enterprises is the lack of funds for setting up dedicated IT infrastructure for all its main and support functions.
Cloud Computing or Software As Service options can reduce the overall IT expenditure in the support areas with minimum own infrastructure. I came across the linked article on the topic.
Computerised Maintenance Management Systems, HR and Payroll packages, Logistics packages etc are available in the Cloud Computing Mode.
Please read the linked article to understand more on the topic.