This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Device Marking clarification on LF355H legacy part

I would like to know what is mean by A+ in the device marking in the LF355 series.  Please let me know asap.  This product is a legacy part from National Semiconductor.  marking_conventions.pdf