LINDO Systems can be reached at the following addresses and telephone numbers:

For sales and product information, please contact us at:

For technical support, we prefer you send your model and questions by email to tech@lindo.com. You may also speak to our technical support staff at 312-988-9421. Our technical support staff can help you with questions regarding the installation and operation of LINGO. If you have simple modeling questions, we can generally help get you pointed in the right direction. If you have extensive modeling questions, we can recommend third party consultants well versed in the specifics of LINGO and mathematical modeling in general, who can assist you in your modeling efforts.