1728 Software Systems

Here's our E-Mail wolf@1728.com   OR   wolf@1728.org

Calculator City


  Time Card Calculators

  and other calculators for   Unit Conversions

  Finance   Geometry   Algebra

  Trigonometry   Calculus

  Astronomy   Chemistry   Meteorology   Physics   Probability

  Basic Math   Misc Calculators

  Ultra Calculators



Website Design Tools


Color Selectors, Font Lists, Font Symbols,
Special Characters, HTML Tutorials,
HTML Character Entities, etc.
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Reference City


The 50 United States (population, area, year admitted, nickname, etc)
U S Presidents (dates served, nickname, birthplace, birth date, etc)
U S Constitutional Amendments,

Oscar Winners, Seven Wonders of The World (4 lists),
Chemical Elements, Morse Code
The 37 Plays of Shakespeare,
Country Abbreviations,
Greek Alphabet

Click Here for Index


Miscellaneous Stuff


Puzzles, Games, Science Project Ideas,
About 1728 Software Systems, Electrical Tutorials,
Electric Guitar Wiring, Automotive Calculators, etc.
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* * * * * External Links * * * * *

Here's a link to what we consider to be the BEST World Time Clock on the Internet. It also has a tremendous perpetual calendar section. This site is fantastic! But don't take our word for it, go to Time and Date:

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Do you like electronics, amateur radio, etc? Then pay a visit to the RF Cafe:

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Looking for a good link to help you with math and science calculations? Yes, 1728 doesn't always have all the answers but that's why we post all these links. A good website covering an extensive range of subjects with clearly written explanations is eHow

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Do you need help with a physics problem?   How about posting your question to the Physics Forums?

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Bad Astronomy is actually a website for "good" astronomy facts, links, news and so on. So how does it earn its "bad" name? By exposing the mistakes about astronomy reported in newspapers, television and movies. Such sources unfortunately are rife with mistakes about astronomy. Luckily, people such as Bad Astronomy's Phil Plait put the media back on the proper astronomical track. This is a top-notch site authored by a well-informed, well-credentialled astronomer.
Please pay a visit to:

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Here's a good website that teaches basic math resources and has calculators:

Internet 4 Classrooms

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Looking for more math websites? One of the better ones, iFigure, is located here:


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A tremendous website for extremely precise scientific data is The National Institute of Standards and Technology (formerly the National Bureau of Standards). This is a highly professional, scientific website that will meet the needs of even the most exacting scientist or web surfer. NIST is a United States government agency and so you know the website and its content can be regarded as impeccable.

Here is a good place to start - their subject index.

Click here for the NIST list of the International System of Units (SI)

Click here for the NIST list of Conversion Factors

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