Arduino is an open-source physical computing platform based on a simple microcontroller board as well as a development environment for writing software for the board. For introductory materials to using Vernier sensors with Arduino, see:

Why can't I upload my sketch to my Arduino Uno/Redboard?
What types of Arduino can be used with Vernier BTA and BTD sensors?
Can our sensors and Vernier Interface Shield be used with 3-volt Arduinos?
Can I use a Vernier BTA ISE with Arduino?
Can I use your sensors and an Arduino to monitor water quality for my aquaponics?
Can I connect two separate Vernier DCUs to the Vernier Interface Shield?
How come my Arduino sketch to control a servo motor with the DCU is not working?
What are the Calibration equations for the CO2 Gas Sensor
Can I use Vernier LabQuest sensors with non-Vernier software or interfaces?
Can I use an Arduino Mega 2560 with the Vernier Interface Shield?
How do I write an Arduino program (sketch) to read the Vernier Encoder System?
To which Arduino pins does the Vernier Interface Shield connect?

SparkFun® RedBoard with cable (ARD-RED)
Vernier Arduino® Interface Shield (BT-ARD)