Tech Museum

Abacus Manufactured by: Various Model: Abacus Year: Back in the prehistoric days before slide rules, the abacus, well, ruled! They're still in use today as some people prefer them to electric calculating machines. Well, at least you know the batteries aren't going to run flat at the worst possible moment! Shown: A plastic Korean abacus. </div></div> </td> </tr> </table> </div> <br /> <footer > <div class="navbar-nav"><br /><br /> <a href="https://www.barrettmanor.com/pages/xyzzy.aspx"><img src="https://www.barrettmanor.com/images/webmaster.gif" alt="Barrett Manor Webmaster" height="15" width="128"/></a><br /> <p style="text-align: center" >Copyright 1995-2026, Stately Barrett Manor</p> </div> </footer> <script src="https://code.jquery.com/jquery-3.6.2.min.js" integrity="sha256-2krYZKh//PcchRtd+H+VyyQoZ/e3EcrkxhM8ycwASPA=" crossorigin="anonymous"></script> <!-- JavaScript Bundle with Popper --> <script type="text/javascript" src="https://www.barrettmanor.com/Scripts/shorten.js"></script> <script type="text/javascript">$(document).ready(function () { $(".comment").shorten({ "showChars": 800, "moreText": "See More", }); });</script> <script src="https://www.barrettmanor.com/Scripts/lightbox.js"></script> <script> $(document).on('click', '[data-toggle="lightbox"]', function(event) { event.preventDefault(); $(this).ekkoLightbox(); });</script> <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.2.3/dist/js/bootstrap.bundle.min.js" integrity="sha384-kenU1KFdBIe4zVF0s0G1M5b4hcpxyD9F7jL+jjXkk+Q2h455rYXK/7HAuoJl+0I4" crossorigin="anonymous"></script> </body> </html>

Abacus
Manufactured by: Various Model: Abacus Year:

Back in the prehistoric days before slide rules, the abacus, well, ruled! They're still in use today as some people prefer them to electric calculating machines. Well, at least you know the batteries aren't going to run flat at the worst possible moment!

Shown: A plastic Korean abacus.