NIOS 10th Admit Card 2024 Download (Regular & Supplementary): NIOS means National Institute of Open Schooling which was recently known as National Open School (NOS), the official portal states that 'NIOS is "Open School" to cater to the needs of the group of learners up to pre-degree level. It was started as a project with in-built flexibilities by the Central Board of … [Read more...]