Radio is the most ubiquitous piece of technology in the country. But opportunities afforded by this handy medium are not been utilised to their optimum by ngos, according to the Bangalore-based ngo Communication for Development and Learning (cdl). To help ngos tap the scope of the medium, the organisation has now produced a handbook, Working with the Radio. The handbook aims to "demystify' radio. Priced at Rs 100, it has sections explaining the working of a radio station, and how to make radio programmes. According to cdl," radio which reaches more than 90 per cent of the country's geographical area and 99 per cent of the population, ought to be the preferred medium for ngos'. "Why this is not so can be explained by our notions of the radio as being a mysterious and highly technical medium that is cloistered behind high walls,' says organisation's executive director Shangon Das Gupta.