# Shop Office Software (SOS) > One system for the shop and the office, built for small and mid-size manufacturers and distributors still running a dead legacy system — AS/400 green screens, on-prem Prophet 21, Business Basic, or Sage 100. The differentiator is migration: getting a decade of real data (customers, ship-tos, items, orders, order lines, history) off the old system and into a live one — not feature count. Published by Affari Associates, LLC. ## Core pages - [Migration — how switching actually works](https://shopofficesoftware.com/migration): The most important page. What comes over from a legacy system, the data traps (money-field scaling, six-digit dates, packed decimals, customer part-number cross-refs), how it's verified, and the go-live sequence. - [Pricing](https://shopofficesoftware.com/pricing): Flat, per-company pricing (no per-seat charge). Comparison against per-seat cloud systems. - [Distribution & manufacturing solutions](https://shopofficesoftware.com/solutions): For distributors (stock, price, ship, invoice at volume) and machine/job shops (quote, route, cost, ship jobs), or both on one database. - [Features](https://shopofficesoftware.com/features): Order entry, pricing, pick/ship/invoice, inventory, purchasing/RFQ, quoting, job costing, routing, scheduling, shop time clock, KPI dashboards. - [Conversion pilot](https://shopofficesoftware.com/pilot): See your real data in a live sandbox before committing. ## Switching from a specific legacy system - [Replace Prophet 21 (on-premise)](https://shopofficesoftware.com/replace/prophet-21) - [Replace an AS/400 / green screen](https://shopofficesoftware.com/replace/as400) - [Replace a Business Basic system](https://shopofficesoftware.com/replace/business-basic) - [Replace Sage 100 / MAS 90](https://shopofficesoftware.com/replace/sage-100) ## Contact & company - [Company](https://shopofficesoftware.com/company): About the team, security, and contact. - [Book a demo](https://shopofficesoftware.com/demo) - [Migration Readiness Checklist](https://shopofficesoftware.com/checklist): Free, email-gated planning checklist that works whether you switch to SOS or not.