What are SAP's most popular applications/solutions used for SCM?

Hello all!

I am a student doing research on SAP and was hoping to narrow down my search on SAP's mostly widely used applications in the SCM field. I understand that many of these applications are tailored to each specific industry, but if there are any applications designed for SCM used across multiple industries, I'd really like to know what they are!

Thanks,

Oliver Levin