Hi Steven,
The TL074 is a quad opamp made 1st by Texas Instruments and is copied by many others.
The 1st link in a Google search is TI's website's introduction page for the TL071 single, TL072 dual and TL074 quad opamps and their datasheet.
It can be used in any opamp circuit that uses a supply of 7V or higher. It is low noise, low distortion and has a bandwidth of 100kHz so is often used in high quality audio circuits.
It has FET inputs with extremely low input bias currents and extremely high input impedance.
Its inputs can operate at its positive supply voltage so it can measure the positive supply current.