The booking of trades is an essential part of the workflow on the trading floor. iSettle automates the booking of repo trades. It captures trades executed on repo markets such as BrokerTec Repo, Eurex Repo, and MTS Repo, processes the trade information and forwards it to the bank's booking system. This minimises the error risk, facilitates the trader's workflow, and brings a significant time saving in comparison to manual booking. iSettle is based on a client-server-architecture and programmed in Java. It is also intended for the booking of further instruments such as bonds and FX.