In the hopes of "preserving these delightful devices for future generations," this collector of slide rules covers everything one could possibly want to know about this crude form of analog computer: from its invention in the 17th century to manufacturers- retailers, 1850-1998, and the Oughtred Society for collectors. Includes a glossary with biographies, patent data, component specs, dating and valuing, care, historical milestones, and illustrations

A complete an essential manual in Spanish for all pastors and religious leaders that would like to manage and run a church of God in order. This manual will teach you all church's and pastor's legal and tax responsibilities. Some of the topics are the following: how to form a church, church and politics, how can a church lose their tax exempt status, board responsibilities, housing allowance, and how to protect the church computer. Un manual completo en como administrar una iglesia y como cumplir con todas las reglas gubernamentales de impuestos y legales. Entre ellos, como formar una iglesia, como la iglesia puede perder su status de exemta, como se determina los salarios de un pastor, como formar el directorio de la iglesia, como el pastor se puede eximir de impuestos, y mucho mas.