In our contribution we focused on finding out the information and computer literacy of high school students. This paper presents the results of an information literacy questionnaire. Questions in the information and computer literacy questionnaire (ICLQ) were concerned with the use of computers, internet, frequency of ICT use and the purpose of internet use. Questions were generally open – ended, but we offered possibilities too. The ICLQ was filled by students (n = 283) of secondary grammar school, from different regions and districts of Slovakia. The number of boys (n =127) and girls was similar (n = 156). We used Pearson chi - square test (χ2), for finding of statistically significant difference between genders. In our research we found that nearly all students use computers and the internet. Most students, nearly 70 %, use the internet at school. About half of all students use the internet at home. This is caused by the fact that service for access to the internet is still expensive for the most of people in Slovakia. We found that the main activity of students on the internet is the search for information (e.g. themes on essays, complementary information to the curriculum…). It means that computer literacy of students is improving. Students can use the internet and computers in school most often after lessons. The internet is using at home and at friend by boys in the higher measure in the comparison with girls. Girls use the internet more at school and at library than boys. Boys use the internet more often than girls.