OR-Notes are a series of introductory notes on topics that fall under the broad heading of the field of operations research (OR). They were originally used by me in an introductory OR course I give at Imperial College. They are now available for use by any students and teachers interested in OR subject to the following conditions.

- Data envelopment analysis
- Facility layout
- Facility location
- Graph theory
- Integer programming
- Inventory control
- Just-in-time
- Linear programming - formulation
- Linear programming - solution
- Linear programming solution examples
- Linear programming - sensitivity analysis - using QSB
- Linear programming - sensitivity analysis - using Solver
- Master production schedule
- Materials requirements planning
- Network analysis
- Network analysis - activity on arc
- Network analysis - activity on node
- Network analysis - linear programming
- Network analysis - extensions (brief overview)
- Network analysis - cost/time tradeoff
- Network analysis - integer programming
- Network analysis - resource restrictions
- Network analysis - uncertain completion times
- Network analysis - summary
- Network flow
- Nonlinear programming
- Soft OR
- Vehicle routing
- Decision trees
- Forecasting
- Markov processes
- Quality control
- Queueing theory
- Simulation
- Stochastic programming