The 1918 flu pandemic, commonly referred to as the Spanish flu, was a category 5 influenza pandemic caused by an unusually severe and deadly Influenza A virus strain of subtype H1N1.
Project Lead The Way (PLTW) is an American nonprofit organization that develops STEM curricula for use by US elementary, middle, and high schools.
A PWS on the other hand is a statement of work for performance-based acquisitions that describes the required results in clear, specific and objective terms with measurable outcomes. We'll explain these terms further. Statement of Work (SOW) vs Performance Work Statement (PWS) Two terms that are sometimes confused and often used interchangeably are  and Performance Work Statement (PWS). We've used the terms interchangeably ourselves. These terms are not the same and in Government contracting, carry very specific meanings.