Services being offered by HRTC

Himachal Road Transport Corporation(HRTC), is the state-owned road transport corporation of the Government of Himachal Pradesh, India. HRTC provides bus services to villages, towns and cities within Himachal Pradesh and nearby states of Uttrakhand, Punjab, Haryana, Delhi, Uttar Pradesh, Jammu and Kashmir and Rajasthan. HRTC is one of the first government owned road transportation corporation in India to offer a facility for online booking of tickets for all types of buses(Ordinary, Volvo, Deluxe and Semi-Delux). The organization serves on 2573 routes with the help of 8813 staff members covering almost 6.05 lakhs Killometres a day. 
According to Wikipedia, HRTC has a fleet of 3158 buses & categorize its buses into 5 categories as:

1. Super Luxury AC Services ("HIMSUTA"): HRTC claims to be the first operator in North India to have started Swedish made safest Volvo services on Shimla-Delhi and Manali-Delhi routes in 2005 on trial basis. The current total Volvo and Scania fleet stands at 100+ buses with daily buses running from Delhi to Shimla, Manali, Dharamshala, Joginder Nagar, Baijnath, Hamirpur, Nalagarh, Chintpurni, Jawala ji, Pathankot, Chamba, Palampur, Rewalsar and Sarkaghat. HRTC's 'Himsuta' bus fleet includes the Volvo 9400 model and Scania Metrolink HD 12.0m model. These 12-meter buses have ten rows of luxury semi-sleeper seats and usb2.0 charging ports. Additional facilities include free Wi-Fi, and water bottles. All The buses are also equipped with CCTV cameras for passenger security.

Both the brands- Volvo and Scania are from Sweden and are considered to be the safest among the vehicle manfacturers.

2. Luxury AC Services ("HIMGAURAV"): HRTC operates air-conditioned Deluxe buses with 2X2 seating configuration on all important routes including Delhi-Shimla, Delhi-Manali, Delhi-Dharamshala and others. The buses also run on a few in state routes including Manali-Shimla. Besides the 11.4 meter luxury Isuzu buses, this class also includes buses built by JCBL and Amar on 210", 243" and 222" WB chassis by TATA or Ashok Leyland. The buses are provided with 35 comfortable and luxurious passenger seats with pushback.

3.Deluxe Non-AC Services ("HIMMANI"): HRTC operates Deluxe buses with 2X2 seating configuration on Delhi-Dehra, Delhi-Shimla, Delhi-Manali, Delhi-Dharamshala, Delhi-Joginder nagar, Delhi-Baijnath, Delhi-Dharampur, Chamba-Shimla and Manali-Shimla routes. The buses are provided with 31 comfortable and luxurious passenger seats with pushback. These buses provide personalized LED cabin light and Usb charging ports.

4. Ordinary Services: HRTC operates 47(ACGL)and 37(Tata-Marcopolo) seater ordinary buses on all routes(including inter-state). The buses come in 2 and 3 seating configuration and ply on ordinary fare set by State Government. 

5. JnNURM (City buses): Urban Transport was one of among many urban infrastructures projects under Jawaharlal Nehru National Urban Renewal Mission to improve the quality of transportation. The bus are purchased from TATA and Ashok-leyland. The buses are provided with 2X2 passenger seats. The buses are fitted with digital destination boards before windshield. The buses are have power steering and aautomated doors features.

6. Him Tarang(Electric Buses): Hrtc bus fleet also includes eco-friendly Electric buses Made by Hyderabad-based company named Goldstone. The company claims that the buses are capable of running 250 km on a single charge. Named as ‘Him Tarang’ the bus runs between the Manali and Rohtang Pass as part of the state government's initiative to save the environment. It covers this 50 km route regularly which is very popular among the tourists. With the initiative, this electric bus is the first zero-emission bus that runs at the highest place anywhere. in the world. This bus has also been introduced in local routes in Shimla.

Other Features: 

a). Emergency door is provided behind the Rear Axle at right side of the bus for more safety to passengers.
b). Luggage space is provided on board and in boot.
C). Air conditioning and Heating in HVAC buses.
d). Comfortable recliner seats.
Note: This information is derived from various sources so you are requested to validate the information on the official website of HRTC.