在深入研究了嵌入式系統特點的基礎上，分析了備份/恢復軟件的設計思想、系統功能及特點，并運用面向對象的軟件工程方法完成了軟件系統的總體設計，定義各個功能模塊，描述了業務邏輯和分析了備份/恢復的過程，該方法簡單、實用，占用系統資源少，具有良好的魯棒性、可移植性和擴展性。并以WindowsCE.NET 和個人數字助理(Personal Digital Assistant，PDA)為軟硬件平臺實現了該軟件。
關鍵詞：嵌入式系統，個人數字助理，備份，恢復
Abstract: On the basis of deep research on characteristic of embedded system, multithreaded and dynamic link libraries technologies. According to the design concepts, system functions and characteristic of Backup/Restore are analyzed, and its holistic design is finished, every functional module is defined, the service logic is described and the procedure of backup/restore is analyzed. The solution is simple and practical, needing a little system resource, and it has good robustness, scalability and portability. And then realize this software system based on Windows CE.NET and PDA software and hardware platform.
Keywords: Embedded System; Personal Digital Assistant; Backup; Restor