We have a variety of USB and PCI devices that will turn your PC in to an oscilloscope
The Ztec range of PCI cards have on-board signal processing and maths, along with large memory to provide complete instrumentation functionality independent of your computer and they come with drivers for the majority of popular programming environments including LabVIEW, C and Visual Basic.
The Handyscopes HS3 and HS4 use USB 2.0 to interface with your computer. They can also act as AWG, voltmeter, spectrum analyser and transient recorder.
Agilent offer two oscilloscopes with 100MHz or 200MHz bandwidths. These can be intergrated with other Agilent USB devices in the Agilent U2781A six-slot chassis.