Creation and tracking of internal and external correspondence, e-mails, letters. Manage technical documents and revisions. View and annotate documents online. Review and approve documents. Share documents for approval with customers or invite suppliers to deliver documents in PIRS Portal: An environment for cross company collaboration. Integrate PIRS into your existing mailing environment. It doesn’t matter what kind of system you are using: Outlook, Office 365, Google Mail or Lotus Notes.