FPGA vs Reconfigurable hardware

what is the difference between a FPGA and reconfigurable hardware??
Is reconfigurable hardware a new field or a well established one??
If it is already an established field,please mention some of its applications??

Sounds like a homework question. Suggest you Google "FPGA" and "reconfigurable hardware".

I searched google and found out that Fpga is a type of reconfigurable hardware...But i am unable to find other applications of reconfigurable hardware..Can someone suggest me a project related to RH ..