GPIB: General purpose interface bus.
robust and reliable communication bus.
it uses parallel bus, gives low latency(time a message takes to travel the system)
It connects and control multiple devices from different vendors.
It is rarely placed on to the PC. Additional plug in comnnection such as GPIB-USB is used.Thus it requires special cables and controllers which add cost

LXI: LAN eXtension of Instrumentation
low cost
much faster block data transfer rate than GPIB
gives all benefit of LAN technology

These all are stand alone intrumentation buses

for further query check this paper
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