TOL is the Time Oriented Language.
It is a programming language dedicated to the world of statistics and focused on time series analysis and stochastic processes.
It is a declarative language based on two key features: simple syntactical rules and powerful set of extensible data types and functions.
TOL is callable by a small text console, but there is also a graphical interface to easily handle all language's tools and functions, providing powerful graphical capacities.
TOL is distributed under the GNU GPL license. A copy of this license is included within the TOL source code and can be accessed following this link.
TOL provides a GUI (Graphical User Interface) called TOLBase. It is useful for evaluating TOL code, editing TOL files and also manage full projects written in TOL.
TOL provides also a command line interpreter and libraries for the communication with VBA or R. For more details, see Software.
You can learn TOL reading TOL Manuals.