9 Downloadable computer application software for mobile phones, namely, software for use in data collection, inventory management, customer management, and sales management; Computer cables; Microcontrollers; Printed circuit boards; Prototyping optical breadboards for electronic circuits; Electronic control circuits for industrial equipment, and digital prototyping devices; Testing apparatus for testing printed circuit boards; Probes for testing integrated circuits; Electronic relay modules for switching a current source on and off via a control signal; Electronic sensors, namely, positioning, temperature, magnetic field, pressure, liquid flow, moisture, pressure, humidity, conductivity, proximity, photosensitivity, photovoltaic, radar, thermal, acoustic, electric current, velocity, acceleration, imaging and force sensors; Computer hardware and downloadable software for collecting and displaying data from environmental sensors; Computer hardware and downloadable software for interfacing with an operating system over a universal serial bus connection; Downloadable computer software for controlling, managing and collecting data from devices connected via a serial connection