Virtual Instruments are user defined measurement or automation systems developed for specific purpose or business.
Virtual Instruments are basically designed and developed according to user’s requirements using customizable software and specific modular hardware. The basic idea behind the concept of Virtual Instruments is to make systems software dependent instead of hardware dependent. Virtual Instruments are a cost effective solution for many scientists and IT experts as instead of buying traditional systems with all traditional capabilities, they can buy a Virtual Instrument with specific features that they actually need. On the other hand, a Virtual Instrument can be build in a way to serve the purpose of two or more different systems or instrument by using specific and customizable software and modular hardware. So in this way, Virtual Instruments replace the vendor defined systems (traditional systems) with user defined systems to facilitate the end user.