This article deals with an optical disk-based office system having two types of finite number of workers: document user and document entry, and all workers operate independently of each other. Document user alternates between using a set of documents and waiting for a set of documents to be retrieved; whereas document entry workers continuously prepare documents for entry into the storage system. The system is modelled as an \(M/G/1\) queueing system in which the service discipline is non-preemptive FIFO with document user (finite source) having priority over document entry (infinite source). The forms of the service time distributions corresponding to ‘storage time’ and ‘retrieval time’ are specified along with a brief review of the model parameters. Operating characteristics like average waiting time and throughput for the document user, PGF of the equilibrium occupancy distribution for the document entry jobs are obtained. The model and methodology are modifications of an earlier paper [see authors and R. B. Kuehl, IEEE Trans. Comput. 39, 819-828 (1990)] where the document entry workers also alternate between ‘document preparation’ and ‘waiting for storage completion’. Numerical results illustrating the behaviour of the system under the two operating policies are also provided.