It is both software and hardware.
1. The software side is the iPhone Side.
a. Siri is installed onto the iPhone at the Apple Manufacturing Plant and is then shipped out to you.
b. The iPhone and the Siri servers communicate over the iPhone's 3G network
2. The hardware side are the Siri Servers.
a. Apple runs and upkeeps servers at some location which provide responses to the iPhone and allow you to use Siri.
b. The servers and Siri communicate over the iPhone's 3G network.
So the answer is both.
Siri - software - was created on 2011-08-09.
'Siri' is a piece of software Siri is not a physical object, merely electronic.
A VDU is hardware.
A scanner is both hardware and software, the device itself is hardware (all devices are hardware) but the driver(a program) that runs it is software.
hardware
A microphone is hardware. Software is what programs and games are called.
both a hardware and software
Motherboards are hardware components, not software.
Have to be hardware. How could you write software if there were no hardware to write it on?
Software. Short and sweet. Hardware needs software to work.
hardware
Yes. Hardware can be touched and software cannot.