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5 kernel-2_4_20-14 last stable 2.4.20 series with security fix
7 ac-2_6_5-1 2.6.5 official kernel
10 LINUX_2_6 2.6.x series on development
16 LINUX_2_4_DZIMI_DEVEL ?
20 LINUX_2_4 2.4.x series development, moved to kernel24.spec