Mission of ISPN To unite and strengthen the presence and the voice of specialty psychiatric-mental health nursing while influencing health care policy to promote equitable, evidence-based and effective treatment and care for individuals, families and communities. Downloadable documents are viewable with the latest FREE Adobe Acrobat Reader. If you don't already have it, just follow this link or click the "Get Acrobat Reader" graphic to the Adobe Systems site. Download the Acrobat Reader to your hard drive. Double-click the icon and follow the on-screen instructions to install.