The new lunawheel is compact portable durable perpetual moon phase calendar. In two simple steps, one can determine the moon phase for any date 2000 years past ...

Collezione di regoli calcolatori con schede di documentazione ed immagini - Slide rule collection with images and documentation

Moonstick Co. is the designer and manufacturer of manual visual calculators for astronomy, timekeeping, and computation

Dr. Strangelove, a film by Stanley Kubrick, I LOVE this picture! Stills, Props, & MP3s.

provides a portable circular slide-rule device for computing the time of sunrise or sunset at any location on Earth on any day of the year

The calendarwheel is a compact portable durable perpetual calendar. In one simple step, one can determine the calendar (including Easter) for any year 2000 ...

Vibra-Tak tells in a moment how much and how fast an object is vibrating.

Free depth of field and hyperfocal distance calculators for Windows® operating systems and Palm OS® devices.

Web en español dedicada a las reglas de calculo ( slide rule ), fotografias, manuales (preferentemente en español) e informacion diversa sobre ellas, venta, s ...

Web en español dedicada a las reglas de calculo ( slide rule ), fotografias, manuales (preferentemente en español) e informacion diversa sobre ellas, venta, s ...