Can you suggest more back-office systems?

As a small business owners, we sometimes neglect those small, yet significant, tasks that bigger companies have whole departments for.

I'm thinking of back-office systems.

I'm sure we've all got things like our accounts under control, including our invoices and our purchase orders, but what about the other back-office systems?

Things like:

• Work enquiries
• A list of clients
• A list of suppliers
• Staff holiday management
• Work applications (e.g. speculative CVs sent through to you)
• Staff sickness management

There must be loads of others; things that I haven't thought of because my business is too small.

Can you suggest some other back-office systems for me?