GO vs Annotation Control

GO-25 SciRPN simulates the venerable HP-25C Programmable Scientific Calculator from 1976. Virtually indistinguishable from the real item in operation, GO-25 is a powerful yet simple retro calculator. • RPN (Reverse Polish Notation) • 10-digit LED calculator display, 10-99 to 10+99 • Four stack registers with roll down • Ten storage registers with arithmetic memory operators • Math, trigonometric, polar/rectangular, sexagesimal/decimal, logarithmic, statistical, power and other miscellaneous functions • Programmable, with annotated program listing, and memory for 99 program steps • Library of Sample Programs • Fast, slow or single step program execution • Program import via pasteboard or from other Apps • Program export via printer, email, pasteboard or to others Apps • iTunes program File Sharing • Two additional windows with views of: ◦ stack/storage registers ◦ keystroke log ◦ program source code ◦ program documentation • Copy-from and Paste-to the calculator display • Simple Paper Tape annotations

The Annotation Control app allows you to annotate from your iPad or iPhone. This app may only be used with the Williams AV Annotation Pro Plus annotation system. The Apple device being used must be on the same Wi-Fi network as the Annotation Pro system. Open the app and select the Connect icon. Find your Annotation Pro system in the list of available systems and select it. Once connected, draw with your fingers to make any desired annotations. If the app is moved to the background (when checking notifications or using other apps), the connection to the Annotation Pro system will be lost. When the app is resumed from the background, the app will attempt to reconnect with permission. If the app takes too long to reconnect or is unable to connect, try to connect by pressing the Available Connections button.