Swamy Publishers (P) Ltd, known for their reference books on rules in the central government departments, celebrated its 50th anniversary here Thursday.

The company's annual publication is considered a handy guide for government employees preparing for departmental examinations.

"Rules are very important. Every government office will invariably have a collection of these books," said BSNL-Chennai Telephones chief general manager K.B. Brahmadathan, chief guest at a function to mark the occasion.

Vatsala Raghu, chief postmaster general, Tamil Nadu circle, released the special cover of the publication.

"The quality of Swamy's publications is unparalleled. They have few errors and are regularly updated," she said.