31. Paul Baran, " a good-humored immigrant from Eastern Europe, " devised a revolutionary concept now called packet switching . 32. He said the Wavenet packet switching network enables reliable two-way communication and efficient use of available radio frequencies. 33. He called the concept packet switching . 34. In 1965 he developed the concept of packet switching in computer networking, and implemented it in the NPL network. 35. Aside from computer scientists, few people had heard of packet switching , much less its 1960s origins, until the 1990s. 36. "We have transferred from analog technology _ analog systems _ to digital systems and packet switching , " said Torrez. 37. Investments in value added network services ( VANS ) and BT's own access level packet switching hardware delayed operating profit. 38. The prize, administered by the National Academy of Engineering, cited Kleinrock for publishing on packet switching as early as 1961. 39. Circuit switching contrasts with packet switching which divides the data to be transmitted into packets transmitted through the network independently. 40. Furthermore, he said, the company plans bigger networks for digital distribution of data, using packet switching for speed and efficiency.