Sybase’s main DBMS product was marketed as Sybase SQL Server and was co-developed for PC by Sybase, Microsoft, and Ashton-Tate. In, 1993, the co-development licensing agreement terminated, and Sybase and Microsoft continued developing their respective products. In 1996, Sybase changed the name of its product to Adaptive Server Enterprise (ASE) as a means to differentiate its SQL Server product from Microsoft SQL Server.
The database runs entirely in the Adaptive Server memory space (cache), so neither log nor data is ever written to disk, and I/O is not required. Its performance can be better than a disk-oriented database, at the cost of durability; in the event of memory failure, the database cannot be recovered.
https://www.sap.com/products/sybase-ase.html
SAP
1987
Sybase SQL Server
SAP