133,130 marginal workers, 9,993 marginal cultivators, 58,052 marginal agricultural labourers, 8,803 marginal workers in household industries and 56,282 other marginal workers. At the time of the 2011 census, 88.48% of the population spoke Tamil, 6.08% Telugu, 2.48% Kannada and 1.58% Urdu as their first language. Education Salem district is home to the Periyar University and the Vinayaka Mission University. The district has many educational institutions including Government Arts College (autonomous), Government Arts College for Women, Government College of Engineering (autonomous), Sona College of Technology (Autonomous), Thiagarajar Polytechnic College (Autonomous), Indian Institute of Handloom Technology, Government Polytechnic College, Central Law College, Sarada Institutions, and Mohan Kumaramangalam College (Medical), Salem Film school, Salem. Schools include Sri Chaitanya Techno School, Holy Cross, Glazebrooke, Holy Angels', St. Johns, Cluny, Golden Gates, Emerald Valley, Senthil Public School, Vidya Mandir, Little Flower, CSI Higher Secondary School and St. Joseph Schools. Law enforcement Law and order is maintained by the Salem district Tamil Nadu Police, headed by a Police commissioner. Special units include prohibition enforcement, district crime, social justice and human rights, district crime records and a district-level special branch headed by a superintendent of police. Salem district have central prison at Hastampatti. It's one of the oldest jail and can able to host 1431 in house prisoners. Industries The Salem handloom industry is one of the most ancient cottage industries and producing quality sari, dothi and angavasthram out of silk yarn and cotton yarn. In the recent past, home furnishing items are also woven, mainly for export purposes. More than 75,000 handlooms are working and the total value of cloth produced per annum is estimated at 500,000 million. With more than 125 spinning mills, with modern weaving units and garment units Salem established itself as one of the major textile center in Tamil Nadu. The history of handloom and spinning mills dates back to pre-independence period in Salem. But until 1960s there were fewer than 5 spinning mills. Private handloom weaving started thriving in the region along with the large scale cooperative sector handloom weaving and marketing units. Small scale hand dying units were started around the region to the industry. Around 1980s the textile industry grew significantly. Many major spinning mills and waste spinning units came up into existence. Many Handloom societies and dying houses were established. New and increased number of Power Loom units were mushroomed in the places like Gugai, Ammapet, Attayampatti, Mallasamudram,