Rajasthan Arthvyavastha, Samaj Kalyan evam Vigyan Prodyogiki (राजस्थान: अर्थव्यवस्था, समाज कल्याण एवं विज्ञान प्रौद्योगिकी) by H.D. Singh and Chitra Rao is a Hindi medium book on the economy, social welfare, and science and technology of Rajasthan. The whole book is written in Hindi (Devanagari script), so Hindi medium aspirants can prepare in their own language. It is published by Raj Panorama (राजपेनोरमा), and this is the Fourteenth Edition (चौदहवां संस्करण), Volume I, Part-2. The book covers three areas of Rajasthan studies: the economy (अर्थव्यवस्था), social welfare (समाज कल्याण), and science and technology (विज्ञान प्रौद्योगिकी). All three come up regularly in Rajasthan-specific papers of state exams. It is written for the State Administrative Service and other exams (राज्य प्रशासनिक सेवा एवं अन्य परीक्षाओं हेतु), making it useful for RAS and other exams conducted by RPSC and RSSB. Key Features: Hindi medium: written entirely in Hindi Economy of Rajasthan Social welfare in Rajasthan Science and technology For RAS (State Administrative Service) and other exams Useful for RPSC and RSSB exams Fourteenth Edition, Volume I, Part-2 By H.D. Singh and Chitra Rao, Raj Panorama यह पुस्तक "राजस्थान: अर्थव्यवस्था, समाज कल्याण एवं विज्ञान प्रौद्योगिकी" एच.डी. सिंह एवं चित्रा राव द्वारा लिखित है और राजपेनोरमा द्वारा प्रकाशित है। यह पूर्णतः हिंदी माध्यम में है। यह इसका चौदहवां संस्करण, खंड-I, भाग-2 है। यह राज्य प्रशासनिक सेवा (RAS) एवं अन्य परीक्षाओं हेतु उपयोगी है, जिनमें RPSC व RSSB द्वारा आयोजित परीक्षाएँ शामिल हैं।