Electronic instruments, namely substitution decade boxes, for supplying a precision electrical characteristic, such as resistance, capacitance, and inductance, for use in the field of or in connection with electronic circuit design and troubleshooting

Electronic instruments, namely substitution decade boxes, for supplying a precision electrical characteristic, such as resistance, capacitance, and inductance, for use in the field of or in connection with electronic circuit design and troubleshooting

Computer operating software

Testing, analysis, and evaluation of laminar airflow and biological safety equipment and environments for the purpose of certification and re-certification