![Daniel Mewes on Twitter: "There's something special about HP's older lisp (RPL) calculators. They give you an interactive computing environment, where functions, infinite precision numbers and symbolic expressions are all first-class citizens. Daniel Mewes on Twitter: "There's something special about HP's older lisp (RPL) calculators. They give you an interactive computing environment, where functions, infinite precision numbers and symbolic expressions are all first-class citizens.](https://pbs.twimg.com/media/DlvoJBAU4AACC22.jpg)
Daniel Mewes on Twitter: "There's something special about HP's older lisp (RPL) calculators. They give you an interactive computing environment, where functions, infinite precision numbers and symbolic expressions are all first-class citizens.
The Run S.M.A.R.T. Project, LLC. - The official VDOT Calculator, created by Jack Daniels (Running), is now available for download (free) on both iPhones and Android. iPhone app store: http://apple.co/19FXszO Google Play
![Jack Daniels' VDOT Running Calculator | Run SMART Project | Marathon training plan beginner, Running workouts, Marathon training plan Jack Daniels' VDOT Running Calculator | Run SMART Project | Marathon training plan beginner, Running workouts, Marathon training plan](https://i.pinimg.com/736x/9b/3d/de/9b3dde529a136dfb45216c620c5fcb9b.jpg)
Jack Daniels' VDOT Running Calculator | Run SMART Project | Marathon training plan beginner, Running workouts, Marathon training plan
![How to Size an Orifice Plate Flow Meter with Software ~ Learning Instrumentation And Control Engineering How to Size an Orifice Plate Flow Meter with Software ~ Learning Instrumentation And Control Engineering](http://1.bp.blogspot.com/-3wgn38QZNjI/UmRKI605mDI/AAAAAAAAA1c/56dcEr9Uu0Q/s640/How+to+Size+Orifice+Plates+With+Software.jpg)