257、according to翻译是根据

53、Doubly-linked list

52、Personal computer

51、Floppy disk

50、Database language

49、Data file

48、End to end

47、Network layer

46、Internet Protocol

45、Significant figure

44、Flash memory ( ) was invented by Dr.Fujio Masuoka while work-ing for Toshiba circa 1980.According to Toshiba, the name “ Hash” was suggested by Dr.Masuo-ka＇s colleague, Mr.Shoji Ariizumi, because the erasure process of the memory contents reminded him of a flash of a camera.Dr.Masuoka presented the invention at the lEEE 1984 International Electron Devices Meeting ( ) held in San Francisco, California.