What is Sabrina's 10 Key?
A professional 10-key adding machine calculator that works EXACTLY like the physical adding machines CPAs use daily. This is NOT a regular calculator - it's a true adding machine with postfix operation (number THEN operator).
- True adding machine operation - Enter number THEN press operator
- Editable tape - Click any entry to modify and auto-recalculate
- Running totals after each operation
- Full numpad support - ENTER key = addition
- Copy tape to clipboard for workpapers
- Auto-decimal mode for currency entry
- Windows 95 aesthetic - no distractions
How to Use
Option 1: Use Online (Easiest)
Click the "Use Calculator Now" button above. No installation needed!
Option 2: Install Chrome Extension
- Download the extension package using the button above
- Extract the ZIP file
- Open Chrome → Extensions → Enable Developer Mode
- Click "Load unpacked" and select the extracted folder
- Pin the extension for quick access
Keyboard shortcut: Alt+C opens the calculator instantly!
Adding Machine vs Calculator
Important: This works like a physical adding machine, NOT a calculator!
Regular Calculator (WRONG for accounting):
2 + 2 = 4
Adding Machine (CORRECT for accounting):
2 [+] → shows 2.00
2 [+] → shows 4.00
Running total updates after EACH operation!
2 + 2 = 4
Adding Machine (CORRECT for accounting):
2 [+] → shows 2.00
2 [+] → shows 4.00
Running total updates after EACH operation!
Keyboard Shortcuts
- ENTER or Numpad + = Addition
- Numpad - = Subtraction
- Numpad * = Subtotal
- Numpad / = Division
- ESC = Clear All
- DELETE = Clear Entry
- Ctrl+C = Copy entire tape
Perfect for CPAs
Designed specifically for accounting professionals who need:
- Familiar 10-key operation
- Tape editing for "what-if" scenarios
- Clean tape output for workpapers
- Auto-decimal for currency entry
- Subtotals without clearing
📄 PDF.js Integration for Pico
Integrate Sabrina's 10 Key directly into PDF.js for seamless calculation while reviewing documents!
What's Included:
- PDF.js viewer extension code
- Calculator integration module
- Floating calculator panel
- Keyboard shortcut configuration
- Step-by-step installation guide
Quick Setup:
- Download the PDF.js integration package below
- Extract files to your PDF.js viewer directory
- Add the integration script to your viewer.html
- Configure keyboard shortcuts (default: Alt+T for toggle)
Code Integration Example:
// Add to your PDF.js viewer.html
<script src="sabrina-tenkey-integration.js"></script>
// Initialize in your viewer.js
PDFViewerApplication.sabrinas10Key = new Sabrinas10KeyIntegration({
position: 'bottom-right',
toggleKey: 'Alt+T',
autoHide: true
});
<script src="sabrina-tenkey-integration.js"></script>
// Initialize in your viewer.js
PDFViewerApplication.sabrinas10Key = new Sabrinas10KeyIntegration({
position: 'bottom-right',
toggleKey: 'Alt+T',
autoHide: true
});
Features in PDF.js:
- Floating calculator panel that doesn't block document
- Drag to reposition anywhere on screen
- Auto-hide when not in use
- Copy results directly to PDF annotations
- Persistent tape history across sessions