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Parker Library on the Web
Digital images of the manuscripts and early printed books entrusted to Corpus Christi College, Cambridge by Matthew Parker (1504-75). Comprises material dating from the sixth to the sixteenth-centuries, and includes a substantial proportion of all extant manuscripts in Anglo-Saxon, plus key Anglo-Norman and Middle English texts. 

Pathologia
Pathologia is an open-educational pathology resource which covers all aspects of human pathology by integrating the cellular and molecular basis of disease with clinical medicine. The content is curated by members of the University of Edinburgh, Edinburgh Pathology and pathologists from NHS Lothian. It replaces the earlier PathCAL, which is no longer available.

Patrologia Latina
All 221 volumes of the Patrologia Latina, the works of the Church Fathers from 200AD to 1216AD, as published by Jacques-Paul Migne. Including all prefatory material, original texts, critical apparatus, indexes, and Migne's column numbers.

Picture Post Historical Archive
Complete archive of the Picture Post newspaper (London, England), including all issues from 1938-1957. Picture Post was a pioneering photojournalism newspaper documenting postwar British society and politics.

Post-War Europe: Refugees, Resettlement and Exile 1945-1950
Collection of 1,000+ primary source documents on refugees and displaced persons in Europe after World War II (1945-1950).  Sources include Home Office, Foreign Office and War Office files from The National Archives, and the Rose Henriques Archive at The Wiener Library, London.

PsycINFO

See APA PsycINFO

PTSDpubs
PTSDpubs, formerly called PILOTS (Published International Literature on Traumatic Stress), is produced by the U.S. Department of Veterans Affairs National Center for PTSD. The database provides citations and abstracts to the worldwide literature on PTSD and other psychological effects of trauma.

PubMed
PubMed includes the Medline database and also indexes journals from PubMedCentral.

Punch Historical Archive
Complete archive of the Punch newspaper (London, England), including all issues from 1841 to 1992.