# Systems

## data

- [Market data](market-data.md)

## modelling

- [Market modelling](market-modelling.md)
- [Decision modelling](decision-modelling.md)
- [Portfolio and risk](portfolio-and-risk.md)

## simulation

- [Simulation](simulation.md)

## research

- [Signal research](signal-research.md)
- [Learning systems](learning-systems.md)

## deployment

- [Rule engines](rule-engines.md)
- [Deployment](deployment.md)

## infrastructure

- [Operating](operating-infrastructure.md)