MathWorks sometimes does what is called a "web release". These are new products that were added after the "main release" when the DVDs were first shipped. They are however included in the current download from the website, hence the name "web release". For example, Powertrain Blockset was released on our website in October 2016, one month after R2016b shipped. Therefore, we say it is a "R2016b+" product.