Computing with a Laptop for the Older Generation By R. A. Penfold

How To Use Oscilloscopes and Other Test Equipment - R.A. Penfold - 1998 - Used

Easy PC Upgrading, Penfold, R. A.

Boost Your PC's Performance By R. A. Penfold

Getting the Most from Your Laptop By R. A. Penfold

Operational Amplifier User's Handbook by Penfold, R. A. Paperback / softback The

Vintage Book - Computing - Voodoo UNIX - Ventana Press - Tips & Tricks Mastery

Electronic Security Devices BP56 R. A. Penfold Babani Hobby Electronics 1979 PB