LTC Areas of Work

Kernel Scalability
Async and other I/O, Locking, Scheduler, Process affinity, RCU etc. 

POSIX Threading

Volume management
EVMS

File Systems
JFS

Networking
IPv4, IPv6, MobileIP, SCTP, IPSec, Etherchannel etc.

Embedded systems
Real Time, Low power, Small memory footprint

Serviceability
dprobes, POSIX event logging, crash dump facility, kernel debugger