Protocol Parameters and their Inter-Relations in X.25. INWG 96.1 Sample Network Architecture

The purpose of this paper is to have a close look at the class of problems that arise in the interconnection of different computer systems through a packet switching network. The layered protocol's architecture is assumed to separate functionally and to identify the tasks to be performed in the various parts of the network, either in the packet switching subnetwork, or in the end processors. Concepts are then introduced to identify the characteristic parameters of each protocol layer. A further step is carried out by considering a sample architecture built on well-known protocols at different levels, up to the transport level, and developing an analysis of their interaction in order to identify interdependencies and constraint relations on the values of the characteristic parameters

Evolution of Computer Networks: Theory and Experience. Proceedings of the Meeting, December 10-12, 1979

The properties of a computer system's architecture can be examined from the point of view of data processing organization, i.e. centralized and distributed organization; utilization mode, i.e. batch and interactive; and communication function, i.e. number and types of protocols, etc. This paper presents a method of system architecture analysis characterized by a model of the user Job Handling Process (JHP). In order to compare the properties of data processing functions and mechanisms in systems with centralized and distributed architectures, JHP and Open Systems Architecture (OSA) models have been used. The typically applicational approach of the JHP model and the layer approach of the OSA model to the analysis of the system architecture permitted the author to propose an additional layer in the OSA mode. This layer defines the interfaces of "job preparation" mechanisms initiated by the open system user

Comparison of the vocabularies of the Gregg shorthand dictionary and Horn-Peterson's basic vocabulary of business letters

This study is a comparative analysis of the vocabularies of Horn and Peterson's The Basic Vocabulary of Business Letters1 and the Gregg Shorthand Dictionary.2 Both books purport to present a list of words most frequently encountered by stenographers and students of shorthand. The, Basic Vocabulary of Business Letters, published "in answer to repeated requests for data on the words appearing most frequently in business letters,"3 is a frequency list specific to business writing. Although the book carries the copyright date of 1943, the vocabulary was compiled much earlier. The listings constitute a part of the data used in the preparation of the 10,000 words making up the ranked frequency list compiled by Ernest Horn and staff and published in 1926 under the title of A Basic Writing Vocabulary: 10,000 Words Lost Commonly Used in Writing. The introduction to that publication gives credit to Miss Cora Crowder for the contribution of her Master's study at the University of Minnesota concerning words found in business writing. With additional data from supplementary sources, the complete listing represents twenty-six classes of business, as follows 1. Miscellaneous 2. Florists 3. Automobile manufacturers and sales companie