TEL AVIV — When Google, the world’s largest search engine, joined forces with Yad Vashem, keeper of the world’s largest Holocaust archive, the first thing one Google employee here did was search for his grandfather’s name.

A link took the employee, Doron Avni, to a Google-operated page on the Yad Vashem Web site showing a photograph of his grandfather, Yecheskel Fleischer, taken in 1941 just after he was released from a Nazi-run prison in Lithuania.

Under the photograph of his grandfather, then 27, dark-eyed and gaunt, Mr. Avni was able to type in details of his grandfather’s story. Icons on the page from Facebook, Twitter and other social media outlets allow for immediate sharing of the images and attached information.