I am very grateful to have had the opportunities to attend Computer Safety courses at the Billerica Public Library taught by Ronald. These were my first experiences learning about computer safety. Ronald is an expert in his field!! His attention to detail is excellent. He is a patient, kind teacher. I strongly recommend Ronald Couming to anyone and everyone for your computer needs! I am so glad I found him! – Heather K. Egan | Esthetician & Natural Nail Technician