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Database Companies

Relational
Borland (dBASE & Paradox)
Borland (InterBase)
Centura/Gupta (SQLBase)
Computer Associates (Ingres)
Dunn Systems (Secure SQLBase)
Empress
IBM (DB2 Family)
Informix
Intersys (MUMPS)
Microsoft (Access)
Microsoft (SQL Server)
Mini SQL
Oracle
Pick Systems
Progress
Quadbase-SQL Server
Raima/dbVista (Velocis Database Server)
Red Brick Systems
Software AG (Adabas)
Solid Information Technology (Solid Server)
Sybase (Sybase11 & others)
Sybase SQL Anywhere (Watcom)
Sysdeco Mimer
Tandem (NonStop SQL)
Unidata

Object-Relational
ADB Inc. (Matisse)
Cincom (Persistence Framework)
IBM (DB2 Extensions)
Illustra
Omniscience
Polyhedra
UniSQL

Document Databases
Folio Infobase

Reporting Tools
Actuate Reporting System

Information Builders (WebFOCUS)
MITI SQR
Platinum Technology InfoQuery/InfoReports
Thomson Software Nomad/Front & Center
Unidata UniDesktop
Seagate Software Crystal Info
Other Database/SQL Information

Sites With Additional Links
Database Systems Laboratory
Database Systems & Logic Programming
Internet Resources for Windows Developers
SQL Reference Page
UCB DBMS Research Group
Web Connections for Database Researchers and Developers
Yahoo Database Resources

SQL Reference Material
Catalog of Free Database Systems
Database Archive (Articles)
Database Standards Information
History of SQL: System R
RDBMS Comparison Chart
Sequoia Benchmark
SQL FAQ: Table of Contents
SQL Information
SQL Standards
TPC Benchmarks

Books
SQL for Smarties: Advanced SQL Programming
Understanding the New SQL: A Complete Guide

Product-Specific Resources
Client/Server Computing (IBM)
Data Integrity and Concurrency in MS SQL Server
Microsoft Access Developer Forum
MS SQL Server Locking Strategy
Oracle FAQ
Transaction Processing Concepts in MS SQL Server
Understanding Relational Design (MS Access)

Related Topics
Center for Secure Information Systems
Online Analytical Processing (OLAP)
Open Database Connectivity FAQ