Which company had the most orders in 1998?
in 1998 refers to YEAR (OrderDate) = 1998; most orders = Max(Count(CustomerID)); company refers to CompanyName
SELECT T1.CompanyName FROM Customers AS T1 INNER JOIN Orders AS T2 ON T1.CustomerID = T2.CustomerID WHERE STRFTIME('%Y', T2.OrderDate) = '1998' GROUP BY T1.CompanyName ORDER BY COUNT(T2.OrderID) DESC LIMIT 1