{"id":723,"date":"2012-12-26T07:24:02","date_gmt":"2012-12-26T07:24:02","guid":{"rendered":"http:\/\/www.sydneysmith.com\/wordpress\/?page_id=723"},"modified":"2017-04-29T23:12:32","modified_gmt":"2017-04-29T23:12:32","slug":"hp21","status":"publish","type":"page","link":"https:\/\/www.sydneysmith.com\/wordpress\/hp21\/","title":{"rendered":"HP21 Emulator"},"content":{"rendered":"<p><a href=\"http:\/\/www.sydneysmith.com\/wordpress\/wp-content\/uploads\/2011\/05\/21.png\"><img loading=\"lazy\" src=\"http:\/\/www.sydneysmith.com\/wordpress\/wp-content\/uploads\/2011\/05\/21-162x300.png\" alt=\"HP21\" width=\"162\" height=\"300\" class=\"alignleft size-medium wp-image-43\" srcset=\"https:\/\/www.sydneysmith.com\/wordpress\/wp-content\/uploads\/2011\/05\/21-162x300.png 162w, https:\/\/www.sydneysmith.com\/wordpress\/wp-content\/uploads\/2011\/05\/21.png 259w\" sizes=\"(max-width: 162px) 100vw, 162px\" \/><\/a><\/p>\n<p>I never had a HP21; but a friend did &#8211; and I sure used it a lot.<\/p>\n<p>It was the first Hewlett Packard calculator I&#8217;d ever seen. It introduced me to the marvels of Reverse Polish Notation (RPN) and it is what set me on the path of owning my own HP calculators.<\/p>\n<p>I&#8217;ve written an emulator for it. Note: clicking the emulator display brings up additional options.<\/p>\n<p>You can: <a href=\"http:\/\/www.sydneysmith.com\/products\/gss-hp21\/run\/index.html\" target=\"_blank\">use it<\/a> or <a href=\"http:\/\/www.sydneysmith.com\/products\/gss-hp21\/run\/app.html\" target=\"_blank\">install it<\/a> (HTML5). You can also <a href=\"http:\/\/www.sydneysmith.com\/download\/1000010000\/gss-hp21\/gss-hp21.zip\">get a copy to keep<\/a> (for free).<\/p>\n","protected":false},"excerpt":{"rendered":"<p>I never had a HP21; but a friend did &#8211; and I sure used it a lot. It was the first Hewlett Packard calculator I&#8217;d ever seen. It introduced me to the marvels of Reverse Polish Notation (RPN) and it is what set me on the path of owning my own HP calculators. I&#8217;ve written &hellip; <a href=\"https:\/\/www.sydneysmith.com\/wordpress\/hp21\/\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">HP21 Emulator<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":3,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"_links":{"self":[{"href":"https:\/\/www.sydneysmith.com\/wordpress\/wp-json\/wp\/v2\/pages\/723"}],"collection":[{"href":"https:\/\/www.sydneysmith.com\/wordpress\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.sydneysmith.com\/wordpress\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.sydneysmith.com\/wordpress\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.sydneysmith.com\/wordpress\/wp-json\/wp\/v2\/comments?post=723"}],"version-history":[{"count":22,"href":"https:\/\/www.sydneysmith.com\/wordpress\/wp-json\/wp\/v2\/pages\/723\/revisions"}],"predecessor-version":[{"id":1547,"href":"https:\/\/www.sydneysmith.com\/wordpress\/wp-json\/wp\/v2\/pages\/723\/revisions\/1547"}],"wp:attachment":[{"href":"https:\/\/www.sydneysmith.com\/wordpress\/wp-json\/wp\/v2\/media?parent=723"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}