Short answers, pulled from the story.
Random House Webster's Unabridged Dictionary was first published in 1966 under the title The Random House Dictionary of the English Language: The Unabridged Edition. It was edited by Jess Stein and contained 315,000 entries across 2,256 pages.
Random House's first dictionary was the American College Dictionary, published in 1947 and edited by Clarence Barnhart. It was based primarily on The New Century Dictionary, which itself was an abridgment of the Century Dictionary.
The 1966 edition was the first dictionary to use computers in its compilation and typesetting. Its dataset included a 25,000,000-word corpus, and the printed edition contained 315,000 entries and 2,400 illustrations.
Where Merriam-Webster's Collegiate cited a single year for a word's first known recorded use, Random House offered a date range such as 1670-80. This approach acknowledged that precise first-use dates are often uncertain.
An appeals court overturned an injunction that Merriam-Webster had won restricting the use of the name Webster's. After that ruling, Random House incorporated Webster's into the dictionary's title and later used the name across many of its publications.
Dictionary.com bases its proprietary content on the Random House unabridged version. A CD-ROM edition released in 1994 also added 120,000 spoken pronunciations to the dictionary's digital form.