Casio MJ-100

Technical Specifications:

• Display Type:
  • Extra-large, tilted LCD display for easy readability.
  • Displays up to 10 digits with clear separation of thousands using commas.
• Keypad Design:
  • Ergonomic and responsive keys with high tactile feedback, designed for fast and accurate input.
  • Color-coded function keys for better usability (e.g., operation keys, memory keys, and tax keys in different colors).
• Power Supply:
  • Dual Power System:
    • Solar Panel: Uses ambient light to power the calculator.
    • Battery Backup: Ensures continuous operation even in low-light conditions, using a replaceable button cell battery (typically an LR44 or equivalent).

Functional Features:

1. Basic Arithmetic Operations:
   • Standard functions for addition, subtraction, multiplication, and division.
2. Memory Functions:
   • M+: Add to memory.
   • M-: Subtract from memory.
   • MRC (Memory Recall/Memory Clear): Recall and clear stored values.
3. Advanced Functions:
   • Tax Calculation:
     • Dedicated TAX+ and TAX- keys for adding or subtracting tax rates. Useful for business and financial calculations.
   • Markup/Mark Down (MU):
     • Quickly calculates profit margins by marking up or marking down prices.
4. Percentage Key (%):
   • Useful for calculating percentages directly in various financial applications.
5. Square Root (√) Function:
   • Provides a quick calculation of square roots with a single keypress.

Usability Enhancements:

• Auto Power-Off:
  • The calculator automatically powers down after a period of inactivity to save battery life.
• Rubber Feet:
  • Non-slip rubber pads on the bottom provide stability during use, preventing the calculator from sliding on smooth surfaces.
• Plastic Casing and Keys:
  • Sturdy plastic body with anti-fade keys, ensuring that frequent use doesn’t wear out key labels.
• Silent Operation:
  • Keys are designed to be silent, making it suitable for quiet office environments.

Applications:

• Home & Personal Use: Ideal for simple budgeting, home accounting, and everyday calculations.
• Office Use: Useful for business professionals handling invoices, tax computations, and profit/loss analysis.
• Retail & Sales: Helps in pricing strategies, tax adjustments, and profit margins.
• Education: Suitable for students needing basic arithmetic and percentage calculations.