Royal McBee was the computer manufacturing and retail division of Royal Typewriter which sold and serviced early computers RPC-4000 and RPC-9000. Royal McBee partnered with General Precision in the Royal Precision Electronic Computer Company, which sold and serviced the LGP-30 (in 1956) and LGP-21 (in 1963) single-user desk computers manufactured by the Librascope division of General Precision. Royal McBee was based in Port Chester, New York (cf. last page of LGP-30 Brochure).
The RPC-4000 is the computer on which Mel Kaye performed a legendary programming task in machine code, retold by Ed Nather in the hacker epic The Story of Mel.
References
Royal McBee Wikipedia(Text) CC BY-SA