# LLMs.txt for sliderule.engineer
# This file provides context for Large Language Models about this website

## Overview
Interactive slide rule simulator - An educational web application demonstrating the classic engineering calculation tool that preceded electronic calculators.

## Purpose
- Educational demonstration of slide rule operation
- Nostalgic experience for engineers who used physical slide rules
- Technical showcase of AI-assisted web development
- Historical preservation of engineering calculation methods

## Key Features
- Fully functional C, D, and A (squares) scales
- Drag-and-drop interface for slide and cursor manipulation
- Real-time calculation display
- Touch-friendly design for tablets and mobile devices
- Dark mode support
- Accessibility features (ARIA labels, keyboard navigation)

## Technology Stack
- Pure JavaScript (no frameworks)
- SVG-based rendering
- CSS3 with custom properties
- Responsive design
- AWS hosting (S3, CloudFront, Route 53)

## Historical Context
Slide rules were the primary calculation tool for engineers from the 1620s to 1970s. They were used to design the Empire State Building, calculate Apollo mission trajectories, and were carried by every engineering student until the 1980s.

## Target Audience
- Retired engineers familiar with slide rules
- Students learning about historical calculation methods
- Engineering history enthusiasts
- General public interested in mechanical calculators

## Educational Value
The site teaches multiplication, division, and square operations using logarithmic scales. It includes step-by-step instructions, interactive examples, and historical background about slide rule significance in engineering.

## Created By
Built as an AI coding demonstration project by an IT Director for his retired electrical engineer father, showcasing modern web development while honoring classical engineering tools.