The Big Red Book, one of Ireland's leading suppliers of small business software, has merged with financial software systems supplier Irish International Sales. The merged entity will be known as Big Red Book and will have turnover of more than #3 million. The company will be based in Dun Laoghaire and will employ 21 people.

The Big Red Book Company has been operating since 1992 and has more than 3,000 customers. Irish International Sales has 1,000 customers.