ATTENTION!: THIS IS A CD, NOT A PHYSICAL/PAPER BOOK!!! Radiotron Designer's Handbooks 3rd, 4th Edition RCA PDF on CD 4 handbooks, 2 RCA radiotron manuals and 7 RCA Call Logs on CD in PDF format in Zip CD Contents: Radiotron Designer's Handbook 3rd Edition ( 1941) by F. Langford Smith: 357 pages Radio Designer's Handbook 4th Edition (1957) by F. Langford Smith: 1540 pages Format: PDF IN ZIP, Language: English "These handbooks on CD have been prepared expressly for the radio set designer, but will be found invaluable to all radio engineers, experimenters and service mechanics." Also included on the CD as bonus: The RCA Radiotron Broadcast Station Directory (1928): 46 pages The RCA Radiotron Broadcast Station Directory (1929): 24 pages Good News About RCA Radiotrons (1930-10): 32 pages RCA Radiotron Radio Log (1931-A): 76 pages RCA Radiotron Radio Log (1931-B): 76 pages RCA Radiotron Radio Stars and Station (1933): 40 pages The RCA Radiotron Manual, Technical Series, No. R-10 (1933): 87 pages The RCA Radiotron Manual, Technical Series, RC-12: 164 pages RCA Radiotron Radio Travel-Log (1936): 36 pages RCA Tube Handbook HB-3 Vol. 5-6 (1955): 915 pages COMPUTER REQUIREMENTS: These old books on CD on PDF in ZIP format after copy them to the computer or put them to the device will work on all PC, MAC Computers, tablets and mobile phones. The softwares needed are adobe reader/adobe reader app and WinZip program which in most cases are already loaded onto your computer/device, if not can be downloaded for free. It will be shipped by UPS/Air mail as a CD and money back guarantee! Windows and Mac compatable Important! Non US buyers please be sure that your State/Province/Region element is filled by you well either in your paypal account?s Account Settings/Account owner information/Address section or in your Bonanza account?s Account Dashboard/Settings/Account Info/Contact Address section when you make order because this is necessary in order that the order processing can be a little bit quicker! Thank you for your cooperation! Ringostarn Shipping is Free.