Computer services were observed in computer and related activities. In 2003 there were 1 892 active enterprises in this activity and they created 135 954 mio SIT of turnover. Clients of enterprises from this activity were in majority enterprises (82.7 % of turnover was created with cooperation with other enterprises). Clients who benefited from services were mainly from Slovenian market; 83.8 % of all clients were residents of Slovenia. Share of turnover created with sale of services typical for the observed activity (specialisation) was compared to the total turnover 56.7%. Among other services larger part (21.5 %) represented services of resale (mostly - 86.4 % resale of software, hardware and equipment).

There were 874 active enterprises in the legal activities in 2003 and they created 21 099 mio SIT of turnover. Share of specialised services was in this activity the most noticeable (94 %). Large users of legal services were enterprises (77.4 %) followed by households and nonprofit institutions (17.3 %). Enterprises from legal activities offered their legal services 10.7% of clients with residensy abrod

In the activity of accounting, book-keeping and auditing, tax consultancy, business and management consultancy there were 6 162 active enterprises in 2003. They created 136 020 mio SIT of turnover. The share of sold specialised services was 34.5 %. Services in this activity were mostly used by enterprises (93.4 % of turnover was made in interaction with enterprises). Customer were mainly from Slovenia (89.7 % of turnover was reached with clients that had residency in Slovenia).

In 2003 there were 183 active enterprises in the activity of market research and public opinion polling. Those enterprises created turnover of 4 577 mio SIT. The share of sold specialised services was in this activity the lowest and amounted to less than quarter of all turnover (24.4 %). Considerable share represented services of advertising (36 %). In this activity enterprises prevailed as customers (96.6 % of turnover was created with enterprises). A good third of turnover represented export (35.7 % of turnover was created with customers that did not have residency in Slovenia).

In 2003 there were 3 618 active enterprises in the architectural and engineering activity and related technical consultancy. These enterprises created 259 873 mio SIT of turnover. The specialisation in this activity was 54.5 %. Among other activities construction had the larger share (13.2 %). The largest part of turnover was created with enterprises (81 %). Up to 90.7 % of turnover was created with customers that had residency in Slovenia.

In the activity of technical testing and analysis there were 105 active enterprises in 2003. They created 7 740 mio SIT of turnover. Services typical for these activities represented 65 % of total turnover. Among other services engineering design services including integrated engineering services forturnkey projects should be mentioned (9.1 %). 81.7 % of turnover was made with other enterprises and 90.9 % of turnover was created with customers that had residency in Slovenia.

There were 763 active enterprises in the activity of advertising in 2003. They created 53 143 mio SIT of turnover. High specialisation was characteristics of advertising (83.3 % of turnover was created with advertising services). Turnover was almost entirely made with enterprises (97 %). With clients that had residency in Slovenia 84.2 % of turnover was made.

In 2003 there were 59 active enterprises in the activity of labour recruitment and provision of personnel. They created 13 215 mio SIT of turnover. The specialisation in this activity was 75.5 %. With other enterprises 86.3 % of turnover was made. Turnover was almost entirely created with customers that had residency in Slovenia (99 %).