Part 1 Generalities - IRI: an international Rawer initiative, D. Bilitza; from Whistler observations to the digisonde network - laudation for Karl Rawer on the occasion of his 80th birthday, B.W. Reinisch; statistical use of ionosonde data for IRI, R. Hanbaba. Part 2 Off median phenomena: short term variability of the ionosphere, A.K. Paul; variability of the F-region parameter h0.5, K.K. Mahajan et al. Part 3 Long term variability: solar cycle variations of annual mean noon foF2, A.V. Mikhailov and V.V. Mikhailov; solar cycle hysteresis on F-region electron concentration peak heights over Tucuman, N. Ortiz de Adler and J.R. Manzano. Part 4 Comparing to/improving of IRI - topside and TEC: using IRI for the computation of ionospheric corrections for altimeter data analysis, D. Bilitza et al; ionospheric slab thickness measurements using GPS satellites in southern Australia, G.L. Goodwin et al. Part 5 F-region: comparative study of modelled foF2 with observations in China, Dai Kailiang et al; testing different models to calculate the peak height at Tucuman, N. Ortiz de Adler and A.M. Sauvage de Avila. Part 6 Lower ionosphere: a contribution to IRI for the D-region, M. Friedrich and K.M. Torkar; model of the electron density height profile in the lowest D-region (50 to 75 km), Mukhtarov and D. Pancheva; ions and electrons in the mesosphere - a model for the quiet D-region, A. Kull et al.