many and varied. some vb.net based on vs2008 for windows mobile (changes to existing projects), some c# based on MVC, some based on xamarin c3 for android platform. All of them are addon applications to mid tier ERP's such as SAP B1, Sage 300 or X3, Acumatica etc. experience with interfacing to ERP's is valuable.
all apps collect data of one form or another and interact back to the ERP via SDK's or PI's of the ERP. the main focus is on Warehouse Management Systems
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