Following up from last month’s column [“Automatic Pumpdown Systems,” Nov. 5], author John Tomczyk discusses different types of automatic pumpdown control systems.

Control system technologies are continually evolving, providing designers and facility owners with an ever-increasing array of options. Programmable logic controllers (PLCs) and distributed control ...

A purchasing system is a process for buying products and services encompassing purchases from requisition and purchase order through payment.