Abacus is a market research company that focuses to a specific and clearly defined part of the procedure of research: Primary data collection.
Quantitative is the kind of research that is based on the data collection from a big sample of respondents, in order to measure the market tendencies and understand consumers' behaviours. There are different kinds of researches such as f2f, d2d, hall tests etc.
Qualitative is the kind of research that is based on In-depth interviews in order to analize the respondnets' opinion/knowledge of a certain product/service. The most common kinds of qualitative research are focus groups and in-depth interviews