[en] Full text: In 2001 the group continued preparations for the ATLAS experiment at the LHC collider at CERN, to study p-p interactions at very high energies (2 x 7 TeV). Several members of the other IFJ groups have also been involved in this effort (J. Blocki, J. Godlewski, Z. Hajduk, J. Halik, B. Kisielewski, M. Stodulski, E. Richter-Was). The work was done in close collaboration with the Faculty of Physics and Nuclear Techniques and with the Academic Computing Centre ''Cyfronet'', of the University of Mining and Metallurgy in Cracow. The activities involved: * simulation studies of physical processes (Higgs search, b-tagging, luminosity monitoring) and the development of software and computing infrastructure for future data analysis, * development and testing of electronics for the Semiconductor Tracker (ASIC VLSI chips, readout hybrids, power supplies), * design of electronics (ASIC VLSI chips, power supply) and control (monitoring) for the Transition Radiation Tracker, * studies of triggering and data filtering systems (architectures, PC farms, switches), * design of construction elements of the ATLAS spectrometer support system (''trucks'') with a goal to produce them in Poland as ''in-kind'' contribution. In 2001 one Ph.D. student (M. Sapinski) defended his thesis; two young researchers have been recruited for a postgraduate position (E. Markiewicz, M. Puchalska). Several members of the team (S. Gadomski, J. Kaplon, R. Szczygiel, M. Zurek) were working directly at CERN; several others (P. Brueckman, A. Kaczmarska, M. Sapinski, M. Wolter) were also taking part in other experiments (CDF, DELPHI, CELESTE, VIRGO), to get experience and to participate in physical data simulation and analysis. Prof. P. Malecki continued as a Polish representative in the ECFA committee. Prof. M. Turala continued as a member of the C11 IUPAP commission and he was invited to become a member of the CERN LHC Electronics Coordination Committee (LECC). At the end of 2001 the ATLAS Laboratory was upgraded to the level of a department (number XIV), with Prof. M. Turala as its head, starting January 2002. (author)