Common inquiry - Self explanatory

Dashboard - For Dashboard screens on Web-enabled Sage

Sage 300 Inquiry - I don't know, none of my clients use it

Item Developers - I don't know, none of my clients use it

thanks jay for your earliest response.

i know little a bit sage inquiry but how this will work in purchase order i don't know,  it would be best to join on skype. wouldn't you ? 

The Inquiry tool allows you to quickly and easily look up information that exists in your Sage 300c system. Choose one of the preset query types and specify search criteria, and the tool displays matching results. For example, to find all A/R documents for a particular customer, use the A/R Documents query type and specify the customer number in search criteria.

When some results are displayed, you can see more information related to a specific transaction by selecting the transaction in the main table (for some query types, information related to the selected transaction is displayed in other tables), or by drilling down to source transactions.

The query type you choose determines the default state of search criteria in the Inquiry tool. However, once you've opened the Inquiry tool, you can change search criteria to perform other queries, as long as they are consistent with the query type.

For example, the A/R Documents query type is limited to finding A/R documents. By default, search criteria for this query type are set up to find all A/R documents for a single customer. You can change the search criteria to find A/R documents based on any combination of customer numbers, document types, fully paid status, and national accounts. But you cannot use this query type to find O/E documents.

any guess would be appreciated because we are trying to explore something new

Great, you've figured it out.